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

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: results sample study ((die filosofia) OR (di filosofia)) la literatura.
• Adding a wildcard symbol may retrieve word variants: results sample study ((die filosofia) or (di filosofia)) la literatura*.