Perhaps you should try some spelling variations:
scales studien » scale studien, scale student, als studien
scale studies » case studies, scale study
di literatura » de literatura, da literatura, ii literatura
filosofia di » filosofia de, filosofia da, filosofia del
e filosofia » la filosofia

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