Perhaps you should try some spelling variations:
die filosofica » di filosofia, de filosofia, e filosofica
la literatura » la litterature, a literature
a literatura » a literature, y literatura, a literatur
safe studie » safe studio, life studie, case studie
tests safe » tests safety, tests scale, tests space
studie die » studie der

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 studie die filosofica ((a literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: tests safe studie die filosofica ((a literatura) OR (la literatura))*.