Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, y literatura
duale studien » duale studium, scale studien, duales studium
de filologia » di filologia, de filosofia, e fisiologia
e filologia » di filologia, e fisiologia, e filosofia
test duale » test double, test delle, test orale

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 studien ((e filologia) OR (de filologia)) de literatura".
• Adding a wildcard symbol may retrieve word variants: test duale studien ((e filologia) OR (de filologia)) de literatura*.