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

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 relay") OR ("4x400 estres pelay"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"4x400 metres relay\") OR (((\"4x400 muestreos relay\") OR (\"4x400 estres pelay\"))))".
• Removing quotes may allow a broader search: (( 4x400 metres relay ) OR ((( 4x400 muestreos relay ) OR ( 4x400 estres pelay )))).
• Adding a wildcard symbol may retrieve word variants: (("4x400 metres relay") OR ((("4x400 muestreos relay") OR ("4x400 estres pelay"))))*.