Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
studium die » studium der
studium des » studium der

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (testo OR texto) duales ((studium die) OR (studium des)) filosofia la literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(testo or texto) duales ((studium die) OR (studium des)) filosofia la literatura".
• Adding a wildcard symbol may retrieve word variants: (testo or texto) duales ((studium die) OR (studium des)) filosofia la literatura*.