Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
filosofia da » filosofia de, filosofia del, filosofia e
studium e » studium 1, studium 3, studium 8
test das » test des, test day, west das

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 das ((studium e) OR (studium _)) filosofia da literatura".
• Adding a wildcard symbol may retrieve word variants: test das ((studium e) OR (studium _)) filosofia da literatura*.