Perhaps you should try some spelling variations:
scale studies » case studies, scale study
da filosofia » di filosofia, a filosofia, de filosofia
e literatura » de literatura, y literatura, e literatur
belt scale » belt scales, belt stable, belt case

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: belt scale studies ((da filosofia) OR (la filosofia)) e literatura.
• Adding a wildcard symbol may retrieve word variants: belt scale studies ((da filosofia) or (la filosofia)) e literatura*.