Perhaps you should try some spelling variations:
studien studien » studien studie, studies studies, studie studie
studie studien » studie studie, studies studies, studie student
e literatura » de literatura, y literatura, e literatur
e filosofia » la filosofia
filosofia e » filosofia de, filosofia del

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "erste ((studien studien) OR (studie studien)) e filosofia e literatura".
• Adding a wildcard symbol may retrieve word variants: erste ((studien studien) OR (studie studien)) e filosofia e literatura*.