Add search query conditions

[darkdh]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

fix #4546

Auditors: @bsclifton

Test Plan:

1. Type ".brave" on url bar and there should be a search result page of ".brave"
2. Type "brave." on url bar and there should be a search result page of "brave."