Perhaps you should try some spelling variations:
da literatura » la literatura, a literatura, de literatura
filosofia da » filosofia de, filosofia del, filosofia e
a filosofia » la filosofia, e filosofia, di filosofia
tests case » test case, tests based, tests code
test cases » test 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: ((tests case) OR (test cases)) study a filosofia da literatura*.