Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
duale studium » duales studium, dualen studium, das studium
3 filosofica » e filosofica, a filosofia, y 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 ((3 filosofica) OR (e filosofia)) da literatura*".