Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
about scales » about sales, about scale, about shapes
da filosofia » la filosofia, di filosofia, a filosofia
belt scales » belt scale, belt scars, event scales
studien da » studien das, studien dar, studien a

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: "((belt scales) OR (about scales)) studien da filosofia del literatura*".