Perhaps you should try some spelling variations:
"4x400 metres relay" » "4x400 mestres relay", "4x400 metros relay", "4x400 metres delay", "4x400 metres pelay", "4x400 metres reay", "4x400 metres reglay", "4x400 metres velay"
"4x400 muestreos rela" » "4x400 muestreo rela", "4x400 muestreados rela", "4x400 nuestros rela", "4x400 muestreos regla", "4x400 muestreos vela", "4x400 muestreos dela"
"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 relay") OR ((("4x400 muestreos rela") OR ("4x400 estres pelayo"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"4x400 metres relay\") OR (((\"4x400 muestreos rela\") OR (\"4x400 estres pelayo\"))))".
• Removing quotes may allow a broader search: (( 4x400 metres relay ) OR ((( 4x400 muestreos rela ) OR ( 4x400 estres pelayo )))).
• Adding a wildcard symbol may retrieve word variants: (("4x400 metres relay") OR ((("4x400 muestreos rela") OR ("4x400 estres pelayo"))))*.