Perhaps you should try some spelling variations:
die filosofia » di filosofia, de filosofia, e filosofia
tests stable » tests table, sets stable, tests scale
e literatura » de literatura, y literatura, e literatur
studien die » studie die, studien der
filosofia e » filosofia de, filosofia del
test table » test tables, tests table, test tabelle

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: "((tests stable) OR (test table)) studien die filosofia e literatura*".