Perhaps you should try some spelling variations:
does filosofia » de filosofia, di filosofia, da filosofia
de literatura » de litterature, la literatura, y literatura
dexa studies » dea studies, edema studies, dna studies
e filosofia » la filosofia
best dexa » best deal, best data

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: best dexa studies ((does filosofia) OR (e filosofia)) de literatura*.