Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
der filosofia » de filosofia, di filosofia, da filosofia
de literatura » de litterature, la literatura, y literatura
e filosofia » la filosofia
sets scale » sets scaled, sets scales, set scale

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