Perhaps you should try some spelling variations:
duale studium » duales studium, dualen studium, das studium
de literature » de litterature, de lite'rature, de literatura
da filosofia » di filosofia, a filosofia, de filosofia
tests duale » tests due, tests scale, tests damage

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: "tests duale studium ((da filosofia) OR (la filosofia)) de literature*".