Perhaps you should try some spelling variations:
scale studies » scale study
die filosofia » di filosofia, de filosofia, e filosofia
da literatura » la literatura, a literatura, de literatura
case studies » case study
filosofia da » filosofia de, filosofia del, filosofia e

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 ((scale studies) OR (case studies)) die filosofia da literatura.
• Adding a wildcard symbol may retrieve word variants: best ((scale studies) or (case studies)) die filosofia da literatura*.