Perhaps you should try some spelling variations:
life literature » polite literature
duales studium » das studium
de filosofia » e filosofia, di filosofia, la filosofia
test duales » test doubles, test rules, test oracles
studium de » studium der, studium des, studium die
prose » prove

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

• If you are trying to use Boolean operators, they must be ALL CAPS: test duales studium de filosofia ((life literature) OR (prose literature))*.