Perhaps you should try some spelling variations:
di filosofica » di filosofia, de filosofia, da filosofia
da literatura » a literatura, de literatura, na literatura
la literatura » la litterature, a literature
test scale » tests scale, best scale, rest scale
study di » study die, study d, study d3

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