Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
filosofia da » filosofia de, filosofia del, filosofia e
studie e » studie _, studie 1, studie 3
test 1 » test 2, test 3

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 1 ((studie e) OR (studie 2)) filosofia da literatura".
• Adding a wildcard symbol may retrieve word variants: test 1 ((studie e) OR (studie 2)) filosofia da literatura*.