Perhaps you should try some spelling variations:
"4x400 muestreos relay" » "4x400 muestreo relay", "4x400 muestreados relay", "4x400 nuestros relay", "4x400 muestreos rela", "4x400 muestreos delay", "4x400 muestreos pelay"
"4x400 metros delas" » "4x400 metro delas", "4x400 petros delas", "4x400 maestros delas"
"4x400 metros degas" » "4x400 metro degas", "4x400 petros degas", "4x400 maestros degas", "4x400 metros demas", "4x400 metros vegas"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("4x400 muestreos relay") OR ((("4x400 metros delas") OR ("4x400 metros degas"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"4x400 muestreos relay\") OR (((\"4x400 metros delas\") OR (\"4x400 metros degas\"))))".
• Removing quotes may allow a broader search: (( 4x400 muestreos relay ) OR ((( 4x400 metros delas ) OR ( 4x400 metros degas )))).
• Adding a wildcard symbol may retrieve word variants: (("4x400 muestreos relay") OR ((("4x400 metros delas") OR ("4x400 metros degas"))))*.