Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, y literatura
scale studies » case studies, scale study
de filosofia » e filosofia, di filosofia, la filosofia
filosofia de » filosofia del
als studien » aus studien, sals studies, als student

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: sets ((als studien) OR (scale studies)) de filosofia de literatura.
• Adding a wildcard symbol may retrieve word variants: sets ((als studien) or (scale studies)) de filosofia de literatura*.