Some photos that are uploaded aren't categorized at all or the person who uploads the photo categorizes a photo differently than someone else would. To cast a wider net and find more results, you might not want to use the style filters. :) Rhoda

Have a look through some of the style idea books to get a better idea of the different classifications, but as Rhoda said above, each pro categorizes their own photos so the definitions can sometimes be a little looser. Try searching by keywords for certain items that characterize the style you are looking as well.