Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
filosofia da » filosofia de, filosofia del, filosofia e
tests data » test data, lists data, testing data
studio di » studio _, studio a, studio 2
studio 3 » studio _, studio a

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 data ((studio di) OR (studio 3)) filosofia da literatura".
• Adding a wildcard symbol may retrieve word variants: tests data ((studio di) OR (studio 3)) filosofia da literatura*.