Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, e literatura
duale studien » duale studium, scale studien, duales studium
da literatura » la literatura, a literatura, de literatura
de filosofia » e filosofia, di filosofia, la filosofia
texto duale » texto durante
studien de » studien der, studien die, studien des

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