Perhaps you should try some spelling variations:
"4x400 muestreos reay" » "4x400 muestreo reay", "4x400 muestreados reay", "4x400 nuestros reay"
"4x400 muestreos rela" » "4x400 muestreo rela", "4x400 muestreados rela", "4x400 nuestros rela", "4x400 muestreos regla", "4x400 muestreos vela", "4x400 muestreos dela"
"4x400 mestres delay" » "4x400 estres delay", "4x400 mestre delay", "4x400 semestres delay", "4x400 mestres delany", "4x400 mestres dela", "4x400 mestres delas"

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