Perhaps you should try some spelling variations:
la litterature » a literature
duale studium » duales studium, dualen studium, das studium
la literatura » a literature
de filosofia » e filosofia, di filosofia, la filosofia
test duale » test double, test delle, test orale
studium de » studium der, studium des, studium die

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