Perhaps you should try some spelling variations:
duale studien » duale studium, scale studien, duales studium
de literatura » de litterature, la literatura, a literatura
em filosofia » e filosofia, la filosofia, di filosofia
y literatura » la literatura
studien em » studien am, studien es, studien beim
testo » test, tests, texto

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: "testo duale studien em filosofia ((de literatura) OR (y literatura))*".