Perhaps you should try some spelling variations:
le literatura » la literatura, de literatura, e literatura
filosofia le » filosofia de, filosofia e, filosofia del
test scale » tests scale, best scale, rest scale
study das » study daas, study deas, study daisy
study da » study dca, 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 da) OR (study das)) filosofia le literatura".
• Adding a wildcard symbol may retrieve word variants: test scale ((study da) OR (study das)) filosofia le literatura*.