Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
test scale » tests scale, best scale, rest scale
study die » study deep, study direct, study daniel

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