Perhaps you should try some spelling variations:
"median age" » "media age", "mediante age"
"mediana age" » "mediaa age", "mediantea age", "medina age", "mediante age", "medicina age"
"medianaaaate age" » "mediaaaaate age", "medianteaaaate age", "medinaaaate age", "medianteaaate age", "medicinaaaate age"
"medianteaaaate age" » "mediateaaaate age", "medianteteaaaate age"

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: "((((\"median age\") OR (\"mediana age\"))) OR (((\"medianaaaate age\") OR (\"medianteaaaate age\"))))~".
• Removing quotes may allow a broader search: (((( median age ) OR ( mediana age ))) OR ((( medianaaaate age ) OR ( medianteaaaate age ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("median age") OR ("mediana age"))) OR ((("medianaaaate age") OR ("medianteaaaate age"))))*.