Perhaps you should try some spelling variations:
le literature » e literature, 2e literature, ce literature
filosofia le » filosofia de, filosofia e, filosofia del
tests scale » tests stable, sets scale, tests shall
e filosofia » la filosofia
tests safe » tests safety, tests space, tests tafel
studien e » studien es, studien _, studien 3

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((tests scale) OR (tests safe)) studien e filosofia le literature*".