Perhaps you should try some spelling variations:
duale studien » duale studium, duales studium, dualen studium
scale studien » scale studies, scale student, soziale studien
die filosofia » di filosofia, de filosofia, e filosofia
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
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) OR (scale studien)) die filosofia la literatura".
• Adding a wildcard symbol may retrieve word variants: testo ((duale studien) OR (scale studien)) die filosofia la literatura*.