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"
"medianatetetea age" » "medianaatetetea age", "mediaatetetea age", "mediasatetetea age"
"mediatea age" » "mediated age", "mediate age", "mediata 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 ("mediatea age"))) OR ("medianatetetea age"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"median age\") OR (((((\"mediante age\") OR (\"mediatea age\"))) OR (\"medianatetetea age\"))))*".
• Removing quotes may allow a broader search: (( median age ) OR ((((( mediante age ) OR ( mediatea age ))) OR ( medianatetetea age ))))*.