Perhaps you should try some spelling variations:
die filosofica » di filosofia, de filosofia, e filosofica
filosofica a » filosofica da, filosofica e, filosofica _
a literatura » la literatura, a literature, y literatura
tests scale » tests stable, sets scale, tests safe
tests table » results table, test suitable, lists tables
test tables » text tables, best tables, trust tables
studies die » studie die, studien die, studies does

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 scale) OR (((tests table) OR (test tables)))) studies die filosofica a literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tests scale) or (((tests table) OR (test tables)))) studies die filosofica a literatura".
• Adding a wildcard symbol may retrieve word variants: ((tests scale) or (((tests table) OR (test tables)))) studies die filosofica a literatura*.