Perhaps you should try some spelling variations:
ii literatura » ii literatur, ii literature, iii literature
tests stable » tests table, sets stable, test table
filosofia ii » filosofia di, filosofica di, filosofia de
tests scale » sets scale, tests safe, tests shall
studien la » studien lap, studien a, studien l

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) OR (tests stable)) studien la filosofia ii literatura*.