Perhaps you should try some spelling variations:
"mediante age" » "mediante el", "mediante la", "mediante un", "mediate age", "mediaste age", "medianaste age"
"median age" » "media age", "medias age", "medianas age"
"mediana age" » "mediaa age", "mediasa age", "medianasa age"
"medianaatetetea age" » "mediaaatetetea age", "mediasaatetetea age", "medianasaatetetea age"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("median age") OR ((((("mediante age") OR ("mediana age"))) OR ("medianaatetetea age"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"median age\") OR (((((\"mediante age\") OR (\"mediana age\"))) OR (\"medianaatetetea age\"))))*".
• Removing quotes may allow a broader search: (( median age ) OR ((((( mediante age ) OR ( mediana age ))) OR ( medianaatetetea age ))))*.