Perhaps you should try some spelling variations:
mexicos » mexikos, lexicos, mexicas
mexicano » mexicana, americano
americana » american, americans, america
americanas » americans, americanss, americas, americanus, americaines
americanos » americans, americano, americanus
mexican » american

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((mexicos OR ((mexicano OR mexico) OR americana)) OR (americanos OR americanas)) OR mexican) / united states.
• Adding a wildcard symbol may retrieve word variants: (((mexicos or ((mexicano or mexico) or americana)) or (americanos or americanas)) or mexican) / united states*.