Perhaps you should try some spelling variations:
space studien » spaces studied, space student, space station
space studies » peace studies, surface studies, case studies
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: "tests ((space studien) OR (space studies)) e filosofia e literatura".
• Adding a wildcard symbol may retrieve word variants: tests ((space studien) OR (space studies)) e filosofia e literatura*.