Perhaps you should try some spelling variations:
duales studium » das studium
de literatura » de litterature, la literatura, y literatura
dd filosofia » di filosofia, da filosofia, la filosofia
de filosofia » e filosofia, di filosofia, la filosofia
test duales » test doubles, test rules, test dummies

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 duales studium ((dd filosofia) OR (de filosofia)) de literatura*".