Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
de literatura » de litterature, la literatura, a literatura
y literatura » la literatura
tests scale » tests stable, sets scale, tests safe
e filosofia » la filosofia
studien e » studien es, studien _, studien 3

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: tests scale studien e filosofia ((de literatura) OR (y literatura)).
• Adding a wildcard symbol may retrieve word variants: tests scale studien e filosofia ((de literatura) or (y literatura))*.