Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
der filosofia » de filosofia, e filosofia, di filosofia
studien der » studie der, studenten der
sets scale » sets scaled, sets scales, sets stable
set scale » belt scale, best scale, rest scale

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: "((set scale) OR (sets scale)) studien der filosofia del literatura*".