Perhaps you should try some spelling variations:
results sample » results example, results simply, results examples
del literatura » de literatura, pela literatura, da literatura
die filosofia » di filosofia, e filosofia, da filosofia
sample study » example study
de filosofia » e filosofia, di filosofia, la filosofia

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: "results sample study ((die filosofia) OR (de filosofia)) del literatura*".