Perhaps you should try some spelling variations:
stable studien » stadler studien, scale studien, table studies
die filosofia » di filosofia, de filosofia, e filosofia
da literatura » la literatura, a literatura, de literatura
tests stable » tests table, sets stable, test table
filosofia da » filosofia de, filosofia del, filosofia e
studien die » studie die, studien der

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

• Adding a wildcard symbol may retrieve word variants: tests stable studien die filosofia da literatura*.