Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
de filosofia » e filosofia, la filosofia, a filosofia
di filosofia » la filosofia, e filosofia
e literatura » de literatura, y literatura, e literatur
sets scale » sets scaled, sets scales, set scale

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: "sets scale studien ((de filosofia) OR (di filosofia)) e literatura".
• Adding a wildcard symbol may retrieve word variants: sets scale studien ((de filosofia) OR (di filosofia)) e literatura*.