Perhaps you should try some spelling variations:
del litterature » de litterature, des litteratures, et litterature
kontext duales » kontext duale, kontext des, kontext das
duales studium » das studium
studium la » studium a, studium als, studium das

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

• Adding a wildcard symbol may retrieve word variants: kontext duales studium la filosofia del litterature*.