Perhaps you should try some spelling variations:
des studenten » der studenten, den studenten, die studenten
y filosofico » y filosoficos, y filosofia, e filosofiche
e filosofica » e filosofia, e filosofiche, a filosofia
e literatura » de literatura, y literatura, e literatur
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 ((y filosofico) OR (e filosofica)) e literatura*".