Perhaps you should try some spelling variations:
duale studien » scale studien, duales studium, dualen studium
duale studium » duales studium, dualen studium, das studium
la literatura » la litterature, a literature
filologia la » biologia la, filologia e, filosofia la

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