Perhaps you should try some spelling variations:
der filosofia » de filosofia, di filosofia, da filosofia
de literatura » de litterature, la literatura, y literatura
space studie » space studies, spaces studied, space study
texts space » text space, tests space, meets 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: "texts space studie ((der filosofia) OR (e filosofia)) de literatura".
• Adding a wildcard symbol may retrieve word variants: texts space studie ((der filosofia) OR (e filosofia)) de literatura*.