Searching within a tag page will search the contents of that tag by default.

[HugehardJiang]

Is your feature request related to a problem? yes

Describe the solution you'd like

Searching within a tag page will search the contents of that tag by default.Many users do not know how to use advanced search when they first start using it, and it is difficult for them to search for content within a certain tag.

Describe alternatives you've considered

Or add a separate search box in the tag page to search the content under the tag.