Perhaps you should try some spelling variations:
doubles studium » duales studium
pela literatura » pena literatura, la literatura, a literatura
del literatura » de literatura, da literatura, e literatura
dd filosofia » di filosofia, de filosofia, da filosofia
studium dd » studium ad, studium d, 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: (test OR text) doubles studium dd filosofia ((del literatura) OR (pela literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(test or text) doubles studium dd filosofia ((del literatura) OR (pela literatura))".
• Adding a wildcard symbol may retrieve word variants: (test or text) doubles studium dd filosofia ((del literatura) OR (pela literatura))*.