Perhaps you should try some spelling variations:
cases studied » cases studies, case studies, glasses studied
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
case studie » case studies, cases studies, case study

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: sets ((case studie) OR (cases studied)) la filosofia la literatura*.