Perhaps you should try some spelling variations:
da literatura » la literatura, de literatura, na literatura
a literatura » la literatura, a literature, y literatura
due studium » duale studium, fur studium, das studium
studium la » studium a, studium als, studium das
tests due » tests die, tests de, tests drug

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