Perhaps you should try some spelling variations:
die filosofica » di filosofia, de filosofia, e filosofica
filosofica y » filosofia y, filosofica e, filosofica _
y literatura » la literatura
tests scale » tests stable, sets scale, tests safe
studies die » studie die, studien die, studies does
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 (test table)) studies die filosofica y literatura.
• Adding a wildcard symbol may retrieve word variants: ((tests scale) or (test table)) studies die filosofica y literatura*.