Perhaps you should try some spelling variations:
es filosofica » e filosofica, e filosofia, em filosofia
filosofica a » filosofica da, filosofica e, filosofica _
tests neue » stents neue, tests newer, tests new
studien es » studien aus, studien bei, studien ein
test neue » test new, ist neue, geht neue

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tests neue) OR (test neue)) studien es filosofica a literature.
• Adding a wildcard symbol may retrieve word variants: ((tests neue) or (test neue)) studien es filosofica a literature*.