Perhaps you should try some spelling variations:
duale studien » duale studium, duales studium, dualen studium
scale studien » scale studies, scale student, soziale studien
filologia y » filologia e, filologica e, biologia y
filosofia y » filosofia e, filosofia _, filosofia de

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: texto ((duale studien) OR (scale studien)) di ((filologia y) OR (filosofia y)) literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "texto ((duale studien) OR (scale studien)) di ((filologia y) or (filosofia y)) literatura".
• Adding a wildcard symbol may retrieve word variants: texto ((duale studien) OR (scale studien)) di ((filologia y) or (filosofia y)) literatura*.