Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
der filosofia » de filosofia, di filosofia, da filosofia
y literatura » la literatura
tests scale » tests stable, sets scale, tests safe
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: tests scale studien ((der filosofia) OR (e filosofia)) y literatura.
• Adding a wildcard symbol may retrieve word variants: tests scale studien ((der filosofia) or (e filosofia)) y literatura*.