Perhaps you should try some spelling variations:
des studenten » der studenten, den studenten, die studenten
da literatura » la literatura, a literatura, de literatura
de filosofia » di filosofia, la filosofia, a filosofia
e filosofia » la filosofia
test des » test der, test test

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "test des studenten ((de filosofia) OR (e filosofia)) da literatura*".