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
studium i » studium im, studium _, studium 3
studium 1 » studium _, studium 3, studium 8

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 ((studium i) OR (studium 1)) filosofia da literatura".
• Adding a wildcard symbol may retrieve word variants: tests data ((studium i) OR (studium 1)) filosofia da literatura*.