Perhaps you should try some spelling variations:
le literatura » la literatura, de literatura, e literatura
a filosofia » la filosofia, di filosofia
e filosofia » la 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 ((a filosofia) OR (e filosofia)) le literatura".
• Adding a wildcard symbol may retrieve word variants: test de studium ((a filosofia) OR (e filosofia)) le literatura*.