Perhaps you should try some spelling variations:
scale studenten » scale student, schuler studenten, alte studenten
studenten die » studenten der, studenten des, studenten und
die filosofia » di filosofia, de filosofia, e filosofia
de literatura » de litterature, la literatura, a literatura
e literatura » e literatur, a literatura, e literature
y literatura » la literatura
tests scale » tests stable, sets scale, tests safe

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 studenten die filosofia ((e literatura) OR (((de literatura) OR (y literatura)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tests scale studenten die filosofia ((e literatura) or (((de literatura) OR (y literatura))))".
• Adding a wildcard symbol may retrieve word variants: tests scale studenten die filosofia ((e literatura) or (((de literatura) OR (y literatura))))*.