Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
scale studies » case studies, scale study
de filosofia » e filosofia, di filosofia, la filosofia
filosofia da » filosofia de, filosofia del, filosofia e
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 da literatura.
• Adding a wildcard symbol may retrieve word variants: sets ((als studien) or (scale studies)) de filosofia da literatura*.