IMHO the searching multiple words (or phrases), Dokuwiki should list first the pages that contains all (or the most) the search words. Currently it lists first the page that has most matches, but possibly only for one word.
What do you thing? :-)
For example just now, I've tried to search pharse "temporary directory" on my wiki. I've got tens of matches, because almost every page contains word "directory" and many of them several tens times. The page I was looking for contains it only few times, but it is one of few that contains word "temporary" too. So it should be on one of the first places. Instead it was tenth.