Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
di filosofia » la filosofia, e filosofia
d filosofia » de filosofia, da filosofia, e filosofia
test scale » tests scale, best scale, rest scale

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 scale study ((d filosofia) OR (di filosofia)) la literatura".
• Adding a wildcard symbol may retrieve word variants: test scale study ((d filosofia) OR (di filosofia)) la literatura*.