Perhaps you should try some spelling variations:
di literatura » de literatura, da literatura, ii literatura
filosofia di » filosofia de, filosofia da, 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 safe) OR (tests scale)) studien e filosofia di literatura*".