Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
during studie » during studies, during study, during soldier
tests during » costs during, protests during, testing during
da filosofia » la filosofia, di filosofia, a filosofia
d filosofia » di filosofia, de filosofia, e filosofia

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 during studie ((d filosofia) OR (da filosofia)) la literatura*.