You have posted this in the right place. Bug reports are accepted on any meta site. This site you're now on is for bugs that are affecting all sites, post on a per-site meta if the bug is only visible / relevant for that specific site. See also the Help: https://meta.stackexchange.com/help/give-feedback
There are links to the help center in both the topbar (question mark) and in the footer (see the non-freehand red circles). From there you either browse or search for articles on a subject. Help does have its own search
As for the bug you're to report. That is not a bug.
In the search result you see both questions and answers. The first is a question (indicated with a Q: for their title), followed by 2 answers (indicated with a A: for their title). Answers don't have tags. So there is nothing to show for that result. This is therefore by design.
If you only want to see questions in your search result add the
is:q search parameter or
is:a if you only want to see answers. Other advanced search options are found here.
If you use a single word that happens to be a popular tag, search does a tag search resulting in only questions to be returned. You can be force a tag search by using brackets around the tag, for example