Perhaps you should try some spelling variations:
de litteratura » de litterature, de literatura, e letteratura
e literatura » de literatura, y literatura, e literatur
texten das » texten des, texten der, text das
studium la » studium a, studium als, studium das

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: texten das studium la filosofia ((de litteratura) OR (e literatura))*.