Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, na literatura
de literatura » de litterature, la literatura, y literatura
studium am » studium im, studium als, studium das
studium a » studium ad, studium _, studium 1
test dem » test des, test de, nebst dem

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((test dem) OR (test der)) ((studium a) OR (studium am)) filosofia ((da literatura) OR (de literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((test dem) or (test der)) ((studium a) or (studium am)) filosofia ((da literatura) OR (de literatura))".
• Adding a wildcard symbol may retrieve word variants: ((test dem) or (test der)) ((studium a) or (studium am)) filosofia ((da literatura) OR (de literatura))*.