Perhaps you should try some spelling variations:
die filosofia » di filosofia, de filosofia, e filosofia
e literatura » de literatura, y literatura, e literatur
tests scale » tests stable, sets scale, tests shall
studien die » studie die, studien der
filosofia e » filosofia de, filosofia del
tests safe » tests safety, tests space, tests tafel
test table » test tables, tests table, test tabelle

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