[fixed][bug?] Site search based on "any" instead of "all" terms?

[Drahken]

I thought the site search was supposed to look for results containing all terms used, not just any of the terms used. However, in at least some cases it is basing results on any terms instead of all terms.

In this particular example, I was searching for the manga "KEMONOTACHI NO YORU", and got back hundreds of results (despite the series not existing on the site). Apparently the search brought back every single anime, manga, user, and review which had "no" in the title. Searching for "KEMONOTACHI YORU" or just "KEMONOTACHI" however, brought back no anime/manga/review results, only a few usernames.
I also tried wrapping the whole title in quotes to try to get the search engine to treat it as a single phrase, and putting a + in front of KEMONOTACHI to get the search engine to make sure to include that term, but it looks like a-p's search engine doesn't understand quotes nor + signs, because it brings back the same results as it doesn't when i don't use them.