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"
"medianaatea age" » "medianaaatea age", "mediaaatea age", "mediasaatea age"
"medianaaatea age" » "medianaaaatea age", "mediaaaatea age", "mediasaaatea 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 ((("medianaatea age") OR ("medianaaatea age"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"median age\") OR (((\"mediante age\") OR (((\"medianaatea age\") OR (\"medianaaatea age\"))))))*".
• Removing quotes may allow a broader search: (( median age ) OR ((( mediante age ) OR ((( medianaatea age ) OR ( medianaaatea age ))))))*.