Perhaps you should try some spelling variations:
des studenten » der studenten, den studenten, die studenten
e filosofiche » ve filosoficke, e filosofica, e filosofie
y literatura » la literatura
y filosofia » e filosofia, a filosofia, la filosofia
test des » test der, test test

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: test des studenten ((e filosofiche) OR (y filosofia)) y literatura*.