Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
duale studium » duales studium, dualen studium, das studium
de filosofia » di filosofia, la filosofia, a filosofia
e filosofia » la filosofia
testo » test, tests, texto

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: "testo duale studium ((de filosofia) OR (e filosofia)) del literatura*".