Perhaps you should try some spelling variations:
di literatura » de literatura, da literatura, ii literatura
data studium » das studium, data studies, data studied
filosofia di » filosofia de, filosofia da, filosofia del
data studio » data studies, data study
e filosofia » la filosofia

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: "tests ((data studium) OR (data studio)) e filosofia di literatura".
• Adding a wildcard symbol may retrieve word variants: tests ((data studium) OR (data studio)) e filosofia di literatura*.