Perhaps you should try some spelling variations:
duales studium » das studium
et litterature » la litterature, art literature
test duales » test doubles, test rules, test oracles
1 filosofia » e filosofia, y filosofia, _ filosofia
a filosofia » la filosofia, e filosofia, di filosofia

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 ((1 filosofia) OR (a filosofia)) et litterature".
• Adding a wildcard symbol may retrieve word variants: test duales studium ((1 filosofia) OR (a filosofia)) et litterature*.