Perhaps you should try some spelling variations:
duales studium » das studium
dd filosofia » di filosofia, da filosofia, la filosofia
de filosofia » e filosofia, di filosofia, la filosofia
e literature » e literatur, life literature, prose literature
test duales » test doubles, test rules, test oracles

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)) e literature".
• Adding a wildcard symbol may retrieve word variants: test duales studium ((dd filosofia) OR (de filosofia)) e literature*.