Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, y literatura
filosofia de » filosofia del
studium la » studium a, studium als, studium das
test des » 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 der) OR (test des)) studium la filosofia de literatura.
• Adding a wildcard symbol may retrieve word variants: ((test der) or (test des)) studium la filosofia de literatura*.