Perhaps you should try some spelling variations:
di literatura » de literatura, da literatura, ii literatura
di filosofia » la filosofia, e filosofia
da filosofia » la filosofia, a filosofia, de filosofia
data studio » data studies, data study
lists data » list data

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: lists data studio ((da filosofia) OR (di filosofia)) di literatura.
• Adding a wildcard symbol may retrieve word variants: lists data studio ((da filosofia) or (di filosofia)) di literatura*.