Perhaps you should try some spelling variations:
scale studenten » scale student, schuler studenten, alte studenten
studenten der » studenten und
der filosofia » de filosofia, e filosofia, di filosofia
de literatur » de literatura, de literatuur, de litterature
tests scale » tests stable, sets scale, tests safe
e literatur » die literatur

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 studenten der filosofia ((e literatur) OR (de literatur)).
• Adding a wildcard symbol may retrieve word variants: tests scale studenten der filosofia ((e literatur) or (de literatur))*.