Perhaps you should try some spelling variations:
da litterature » la litterature, de litterature, a litterature
da filosofia » la filosofia, di filosofia, de filosofia
a filosofia » la filosofia, e filosofia, di filosofia
d studium » _ studium, 2 studium, 4 studium
test d » test de, test do, test der

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 d studium ((da filosofia) OR (a filosofia)) da litterature.
• Adding a wildcard symbol may retrieve word variants: test d studium ((da filosofia) or (a filosofia)) da litterature*.