Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
die filosofia » di filosofia, de filosofia, e filosofia
de literatura » la literatura, y literatura, a literatura
duale studie » duale studien, duale studium, duales studium
test duale » test double, test delle, test orale
studie die » studie der

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: "test duale studie die filosofia ((de literatura) OR (de litterature))*".