diff --git a/internal/repo/search_common/search_repo.go b/internal/repo/search_common/search_repo.go
index de3c03ebb..cbe04609b 100644
--- a/internal/repo/search_common/search_repo.go
+++ b/internal/repo/search_common/search_repo.go
@@ -98,7 +98,7 @@ func NewSearchRepo(
 }
 
 // SearchContents search question and answer data
-func (sr *searchRepo) SearchContents(ctx context.Context, words []string, tagIDs []string, userID string, votes int, page, size int, order string) (resp []*schema.SearchResult, total int64, err error) {
+func (sr *searchRepo) SearchContents(ctx context.Context, words []string, tagIDs [][]string, userID string, votes int, page, size int, order string) (resp []*schema.SearchResult, total int64, err error) {
 	words = filterWords(words)
 
 	var (
@@ -160,8 +160,12 @@ func (sr *searchRepo) SearchContents(ctx context.Context, words []string, tagIDs
 				ast + ".tag_id": tagID,
 				ast + ".status": entity.TagRelStatusAvailable,
 			})
-		argsQ = append(argsQ, entity.TagRelStatusAvailable, tagID)
-		argsA = append(argsA, entity.TagRelStatusAvailable, tagID)
+		argsQ = append(argsQ, entity.TagRelStatusAvailable)
+		argsA = append(argsA, entity.TagRelStatusAvailable)
+		for _, t := range tagID {
+			argsQ = append(argsQ, t)
+			argsA = append(argsA, t)
+		}
 	}
 
 	// check user
@@ -236,7 +240,7 @@ func (sr *searchRepo) SearchContents(ctx context.Context, words []string, tagIDs
 }
 
 // SearchQuestions search question data
-func (sr *searchRepo) SearchQuestions(ctx context.Context, words []string, tagIDs []string, notAccepted bool, views, answers int, page, size int, order string) (resp []*schema.SearchResult, total int64, err error) {
+func (sr *searchRepo) SearchQuestions(ctx context.Context, words []string, tagIDs [][]string, notAccepted bool, views, answers int, page, size int, order string) (resp []*schema.SearchResult, total int64, err error) {
 	words = filterWords(words)
 	var (
 		qfs  = qFields
@@ -343,7 +347,7 @@ func (sr *searchRepo) SearchQuestions(ctx context.Context, words []string, tagID
 }
 
 // SearchAnswers search answer data
-func (sr *searchRepo) SearchAnswers(ctx context.Context, words []string, tagIDs []string, accepted bool, questionID string, page, size int, order string) (resp []*schema.SearchResult, total int64, err error) {
+func (sr *searchRepo) SearchAnswers(ctx context.Context, words []string, tagIDs [][]string, accepted bool, questionID string, page, size int, order string) (resp []*schema.SearchResult, total int64, err error) {
 	words = filterWords(words)
 
 	var (
diff --git a/internal/schema/search_schema.go b/internal/schema/search_schema.go
index e15339533..90b08cebe 100644
--- a/internal/schema/search_schema.go
+++ b/internal/schema/search_schema.go
@@ -64,7 +64,7 @@ type SearchCondition struct {
 	// only show this question's answer
 	QuestionID string
 	// search query tags
-	Tags []string
+	Tags [][]string
 	// search query keywords
 	Words []string
 }
diff --git a/internal/service/search_common/search.go b/internal/service/search_common/search.go
index d1aea5479..c19fdc494 100644
--- a/internal/service/search_common/search.go
+++ b/internal/service/search_common/search.go
@@ -26,8 +26,8 @@ import (
 )
 
 type SearchRepo interface {
-	SearchContents(ctx context.Context, words []string, tagIDs []string, userID string, votes, page, size int, order string) (resp []*schema.SearchResult, total int64, err error)
-	SearchQuestions(ctx context.Context, words []string, tagIDs []string, notAccepted bool, views, answers int, page, size int, order string) (resp []*schema.SearchResult, total int64, err error)
-	SearchAnswers(ctx context.Context, words []string, tagIDs []string, accepted bool, questionID string, page, size int, order string) (resp []*schema.SearchResult, total int64, err error)
+	SearchContents(ctx context.Context, words []string, tagIDs [][]string, userID string, votes, page, size int, order string) (resp []*schema.SearchResult, total int64, err error)
+	SearchQuestions(ctx context.Context, words []string, tagIDs [][]string, notAccepted bool, views, answers int, page, size int, order string) (resp []*schema.SearchResult, total int64, err error)
+	SearchAnswers(ctx context.Context, words []string, tagIDs [][]string, accepted bool, questionID string, page, size int, order string) (resp []*schema.SearchResult, total int64, err error)
 	ParseSearchPluginResult(ctx context.Context, sres []plugin.SearchResult) (resp []*schema.SearchResult, err error)
 }
diff --git a/internal/service/search_parser/search_parser.go b/internal/service/search_parser/search_parser.go
index a5dfd6700..6485e1629 100644
--- a/internal/service/search_parser/search_parser.go
+++ b/internal/service/search_parser/search_parser.go
@@ -105,7 +105,7 @@ func (sp *SearchParser) ParseStructure(ctx context.Context, dto *schema.SearchDT
 }
 
 // parseTags parse search tags, return tag ids array
-func (sp *SearchParser) parseTags(ctx context.Context, query *string) (tags []string) {
+func (sp *SearchParser) parseTags(ctx context.Context, query *string) (tags [][]string) {
 	var (
 		// expire tag pattern
 		exprTag = `\[(.*?)\]`
@@ -119,17 +119,25 @@ func (sp *SearchParser) parseTags(ctx context.Context, query *string) (tags []st
 		return
 	}
 
-	tags = []string{}
+	tags = make([][]string, 0)
 	for _, item := range res {
+		tagGroup := make([]string, 0)
 		tag, exists, err := sp.tagCommonService.GetTagBySlugName(ctx, item[1])
 		if err != nil || !exists {
 			continue
 		}
+		tagGroup = append(tagGroup, tag.ID)
 		if tag.MainTagID > 0 {
-			tags = append(tags, fmt.Sprintf("%d", tag.MainTagID))
-		} else {
-			tags = append(tags, tag.ID)
+			tagGroup = append(tagGroup, fmt.Sprintf("%d", tag.MainTagID))
 		}
+		synIDs, err := sp.tagCommonService.GetTagIDsByMainTagID(ctx, tag.ID)
+		if err != nil || !exists {
+			continue
+		}
+		tagGroup = append(tagGroup, tag.ID)
+		tagGroup = append(tagGroup, synIDs...)
+		tagGroup = converter.UniqueArray(tagGroup)
+		tags = append(tags, tagGroup)
 	}
 
 	// limit maximum 5 tags
diff --git a/pkg/converter/array.go b/pkg/converter/array.go
index 7718ee69b..2b122203e 100644
--- a/pkg/converter/array.go
+++ b/pkg/converter/array.go
@@ -32,3 +32,15 @@ func ArrayNotInArray(original []string, search []string) []string {
 	}
 	return result
 }
+
+func UniqueArray[T comparable](input []T) []T {
+	result := make([]T, 0, len(input))
+	seen := make(map[T]bool, len(input))
+	for _, element := range input {
+		if !seen[element] {
+			result = append(result, element)
+			seen[element] = true
+		}
+	}
+	return result
+}
diff --git a/plugin/search.go b/plugin/search.go
index 20ff0f0ac..719d4294c 100644
--- a/plugin/search.go
+++ b/plugin/search.go
@@ -56,7 +56,7 @@ type SearchBasicCond struct {
 	// The keywords for search.
 	Words []string
 	// TagIDs is a list of tag IDs.
-	TagIDs []string
+	TagIDs [][]string
 	// The object's owner user ID.
 	UserID string
 	// The order of the search result.