Perhaps you should try some spelling variations:
den studenten » der studenten, von studenten, fur studenten
der filosofia » de filosofia, di filosofia, da filosofia
e literatura » de literatura, y literatura, e literatur
e filosofia » la filosofia
test den » test der, test des, test de

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 den studenten ((der filosofia) OR (e filosofia)) e literatura*".