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

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 study ((da filosofia) OR (di filosofia)) le literatura*".