Perhaps you should try some spelling variations:
duales studium » das studium
test duales » test doubles, test rules, test oracles
y filosofia » e filosofia, la filosofia, di filosofia
a filosofia » la filosofia, e filosofia, di filosofia
literatur* » literature*

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 ((y filosofia) OR (a filosofia)) teil literatur*".