Perhaps you should try some spelling variations:
scales studies » scale studies, cases studies, scale studien
scale student » late student, scale study, scale studies
dd filosofia » di filosofia, de filosofia, da filosofia
e literatura » de literatura, y literatura, e literatur
filosofia e » filosofia de, filosofia del

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