Perhaps you should try some spelling variations:
"mediante age" » "mediante el", "mediante la", "mediante un", "medianate age", "mediate age", "mediaste age"
"median age" » "mediana age", "media age", "medias age"
"medianteate age" » "medianateate age", "mediateate age", "mediasteate age", "medianamente age"
"medianteteate age" » "medianateteate age", "mediateteate age", "mediasteteate 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 ((("medianteate age") OR ("medianteteate age"))))) OR ("mediante age"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"median age\") OR (((\"medianteate age\") OR (\"medianteteate age\"))))) OR (\"mediante age\"))*".
• Removing quotes may allow a broader search: (((( median age ) OR ((( medianteate age ) OR ( medianteteate age ))))) OR ( mediante age ))*.