Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
da filosofia » di filosofia, a filosofia, de filosofia
de studium » dem studium, des studium, d studium
test de » test der, test des, est de

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