Perhaps you should try some spelling variations:
studium das » studium der, studium als
studium die » studium der
studium des » studium der
filosofia a » filosofia da, filosofia la, filosofia e
tests die » test die, tests der

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: tests die ((studium das) OR (((studium die) OR (studium des)))) filosofia a literature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tests die ((studium das) or (((studium die) OR (studium des)))) filosofia a literature".
• Adding a wildcard symbol may retrieve word variants: tests die ((studium das) or (((studium die) OR (studium des)))) filosofia a literature*.