Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
di filosofia » la filosofia, e filosofia
items studie » stems studies, cems studies, dems studies
filosofia da » filosofia de, filosofia del, filosofia e
items die » items der, items des

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: test ((items studie) OR (items die)) di filosofia da literatura.
• Adding a wildcard symbol may retrieve word variants: test ((items studie) or (items die)) di filosofia da literatura*.