Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
di filosofia » la filosofia, e filosofia
allo studio » lo studio
a filosofia » la filosofia, e filosofia
test allo » test all, test also, test hello

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: "test allo studio ((a filosofia) OR (di filosofia)) del literatura*".