Perhaps you should try some spelling variations:
dualen studium » duales studium, duale studium
la literatura » la litterature, a literature
testo dualen » des dualen
da filosofia » la filosofia, di filosofia, a filosofia
d filosofia » di filosofia, de filosofia, e filosofia

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 dualen studium ((d filosofia) OR (da filosofia)) la literatura*".