Perhaps you should try some spelling variations:
die filosofica » di filosofia, de filosofia, vida filosofica
space studien » space studies, spaces studied, space student
cities space » cities state, cities impact, cities places
e filosofica » e filosofia, e filosofiche, a 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: "cities space studien ((die filosofica) OR (e filosofica)) a literature".
• Adding a wildcard symbol may retrieve word variants: cities space studien ((die filosofica) OR (e filosofica)) a literature*.