Perhaps you should try some spelling variations:
pela literatura » pena literatura, la literatura, a literatura
filosofia pela » filosofia della, filosofia del, filosofia para
duales studium » das studium
duale studium » dualen studium, das studium
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: "quito ((duale studium) OR (duales studium)) e filosofia pela literatura".
• Adding a wildcard symbol may retrieve word variants: quito ((duale studium) OR (duales studium)) e filosofia pela literatura*.