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

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