Perhaps you should try some spelling variations:
results sample » results example, results simply, results examples
die filosofia » di filosofia, de filosofia, da filosofia
da literatura » la literatura, a literatura, de literatura
sample study » example study
e 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 (e filosofia)) da literatura".
• Adding a wildcard symbol may retrieve word variants: results sample study ((die filosofia) OR (e filosofia)) da literatura*.