Perhaps you should try some spelling variations:
duale studium » duales studium, dualen studium, das studium
de filosofia » e filosofia, di filosofia, la filosofia
y literatura » la literatura
filosofia y » filosofia e, filosofia _, filosofia de
studium de » studium der, studium des, studium die

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 OR tests) duale studium de filosofia y literatura*.