Perhaps you should try some spelling variations:
der filosofica » de filosofia, e filosofica, di filosofia
space studien » space studies, spaces studied, space student
a literatura » la literatura, a literature, y literatura
tests space » test space, texts space, lists space
e filosofia » la filosofia

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