Perhaps you should try some spelling variations:
der filosofica » de filosofia, e filosofica, e filosofia
space studien » spaces studied, space student, space station
space studies » peace studies, surface studies, case studies
filosofica a » filosofica da, filosofica e, filosofica _
a literatura » la literatura, a literature, y literatura

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)) der filosofica a literatura".
• Adding a wildcard symbol may retrieve word variants: tests ((space studien) OR (space studies)) der filosofica a literatura*.