Perhaps you should try some spelling variations:
le literatura » la literatura, de literatura, e literatura
scale student » late student, scale study, scale studies
di filosofia » la filosofia, e filosofia
tests scale » tests stable, sets scale, tests safe
a filosofia » la filosofia, e filosofia

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 scale student ((a filosofia) OR (di filosofia)) le literatura".
• Adding a wildcard symbol may retrieve word variants: tests scale student ((a filosofia) OR (di filosofia)) le literatura*.