Bumping this because this is a very important feature. As the website grows, this will become increasingly a problem that needs addressing. It helps a lot to be able to refine your search. Like, say, you wanna see furry art, but then you wanna hone in on searching for specific furry art (like say, you're looking for kangaroos, or commission postings for furry art).
Adding to this: Is it feasible to exclude tags from an individual search?
Like if you search "#reptiles #lizards -#geckos", you'd want to be shown all posts that are tagged with both "reptiles" and "lizards", minus any that are tagged "geckos".
Sometimes I don't necessarily want to like, block or mute a tag outright, but for the purposes of individual searches maybe I'm trying to find something specific and I want to narrow down what I'm searching for by some particular parameters.
Having a "posts including tag x" and a "posts excluding tag y" field would probably also accomplish the same idea? I've seen this kind of search capability on forums before and it's really nice for being able to find precise information, especially in older posts.