Perhaps you should try some spelling variations:
dem studium » das studium, im studium, zum studium
filosofia a » filosofia da, filosofia la, filosofia y
filosofia _ » filosofia y, filosofia de, filosofia da
filosofia e » filosofia de, filosofia del
studium e » studium _, studium 1, studium 3
test dem » test der, test des, test de

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