Perhaps you should try some spelling variations:
duale studien » duale studium, scale studien, duales studium
de literatura » de litterature, la literatura, a literatura
dd filosofia » di filosofia, de filosofia, da filosofia
y literatura » la literatura
texto duale » texto durante
studien dd » studies dd, studien der, studien die

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: "texto duale studien dd filosofia ((de literatura) OR (y literatura))".
• Adding a wildcard symbol may retrieve word variants: texto duale studien dd filosofia ((de literatura) OR (y literatura))*.