Perhaps you should try some spelling variations:
e literatura » de literatura, e literatur, a literatura
y literatura » la literatura
studien der » studie der, studenten der
studien di » studien die, studien dd, studien bei
set scale » sets scale, belt scale, best scale

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