Perhaps you should try some spelling variations:
der filosofia » de filosofia, e filosofia, di filosofia
de literatura » de litterature, la literatura, a literatura
space studie » space studies, spaces studied, space study
y literatura » la literatura
texts space » text space, tests space, meets space
studie der » studium der

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 ((de literatura) OR (y literatura))".
• Adding a wildcard symbol may retrieve word variants: texts space studie der filosofia ((de literatura) OR (y literatura))*.