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

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 dem studium la ((filosofia le) OR (filosofia e)) litterature".
• Adding a wildcard symbol may retrieve word variants: test dem studium la ((filosofia le) OR (filosofia e)) litterature*.