Perhaps you should try some spelling variations:
"4x400 metres rela" » "4x400 mestres rela", "4x400 metros rela", "4x400 metres regla", "4x400 metres vela", "4x400 metres dela"
"4x400 muestreos relay" » "4x400 muestreos reglay", "4x400 muestreos velay", "4x400 muestreos delay", "4x400 muestreo relay", "4x400 muestreados relay", "4x400 nuestros relay", "4x400 muestreos pelay", "4x400 muestreos reay"
"4x400 estres pelayo" » "4x400 estrenos pelayo"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("4x400 metres rela") OR ((("4x400 muestreos relay") OR ("4x400 estres pelayo"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"4x400 metres rela\") OR (((\"4x400 muestreos relay\") OR (\"4x400 estres pelayo\"))))*".
• Removing quotes may allow a broader search: (( 4x400 metres rela ) OR ((( 4x400 muestreos relay ) OR ( 4x400 estres pelayo ))))*.