Perhaps you should try some spelling variations:
duales studium » das studium
die filosofia » di filosofia, e filosofia, da filosofia
de filosofia » e filosofia, di filosofia, la filosofia
y literatura » la literatura
testo » test, tests, texto

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: testo duales studium ((die filosofia) OR (de filosofia)) y literatura.
• Adding a wildcard symbol may retrieve word variants: testo duales studium ((die filosofia) or (de filosofia)) y literatura*.