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 relay" » "4x400 mestres delay", "4x400 mestres pelay", "4x400 mestres reay", "4x400 estres relay", "4x400 mestre relay", "4x400 muestreos relay", "4x400 mestres reglay", "4x400 mestres velay"

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