Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
testi della » test della, testi delle, reti della
testa della » resta della, test della, eta della
studien bei » studie bei
studien e » studien es, studien _, studien 3

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: ((testi della) OR (testa della)) ((studien e) OR (studien bei)) filosofia la literatura.
• Adding a wildcard symbol may retrieve word variants: ((testi della) or (testa della)) ((studien e) or (studien bei)) filosofia la literatura*.