Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
del literatura » pela literatura, da literatura, e literatura
duale studien » duale studium, scale studien, duales studium
de literatura » la literatura, y literatura, a literatura
texto duale » texto durante
3 filosofia » e filosofia, a filosofia, y filosofia
studien 3 » studien _, studien 4, studien 5

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: texto duale studien 3 filosofia ((del literatura) OR (((de literatura) OR (de litterature)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "texto duale studien 3 filosofia ((del literatura) or (((de literatura) OR (de litterature))))".
• Adding a wildcard symbol may retrieve word variants: texto duale studien 3 filosofia ((del literatura) or (((de literatura) OR (de litterature))))*.