lucy24 - 7:25 am on Aug 8, 2011 (gmt 0)
Google may "know" from the data that people typing in brown skirt want a brown skirt OR DRESS, but that people typing in skirt brown definitely want a skirt, ideally with some brown in it.
Then again, the first group may have been aiming for "brown shirt" and mis-typed. As a pre-existing phrase it's definitely got the advantage. (Not to g###, though: I just checked.)