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

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

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