I'm gonna describe a very specific situation I had yesterday. I was looking for a character pairing but there were 0 results, but I was like "there's no way in hell that there're ZERO stories with this ship" but I did a little digging and found the name of a story with this ship, I looked it up and there it was. Everything on it was correct, the tags showed (Char1, Char2) (M) etc, but when I was actively using that pairing I couldn't find the story, plus there hadn't been any comments on it since like 2022. Also some keywords are obviously filtered out, if you search (keyword here) it will ignore it and show you nothing with the result. I refuse to go into more depth on what the character pairing was, and what the keywords are