Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
scale studien » scale studies, scale student, duale studien
de filosofia » e filosofia, la filosofia, a filosofia
di filosofia » la filosofia, e filosofia
testo scale » tests scale, meso scale, best 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: "testo scale studien ((de filosofia) OR (di filosofia)) de litterature".
• Adding a wildcard symbol may retrieve word variants: testo scale studien ((de filosofia) OR (di filosofia)) de litterature*.