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

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