Tag search is now completed. The help isn't updated yet, but: to use a tag in a search, use the syntax
tag:tagname. You can use the
- operator with it, same as for other search terms. Searching for two tags is an AND.
I tried your search and it returns both questions and answers. It looks like we need to add searching by post type (
type:question or something like that). I'll file an issue for that if we don't have one already.
To search in a specific category, you can now search for "category:###", where ### is the category number from the URL. For example, Meta Q&A is category 3 and Meta Blog is category 30.