Perhaps you should try some spelling variations:
der filosofica » de filosofia, e filosofica, e filosofia
filosofica e » filosofia e, filosofica da, filosofia de
e literatura » de literatura, y literatura, e literatur
test groups » test group, test grounds, list groups
host groups » point groups, about groups
studied der » studie der, studien der, studies 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: "((test groups) OR (host groups)) studied der filosofica e literatura*".