Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
duale studien » duale studium, scale studien, duales studium
de filosofia » e filosofia, di filosofia, la filosofia
tests duale » tests due, tests scale, tests damage
studien de » studien der, studien die, studien des

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: tests duale studien de filosofia del literatura*.