Perhaps you should try some spelling variations:
mexicanos » mexicana, mexicanas, mexicos, americanos
mexicano » mexicana, mexico, americano
americano » american, americans, americana
americanos » americans, americanss, americanas, americanus, american
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: (((mexicanos OR (mexicano OR americano)) OR americanos) OR mexican) / united states.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((mexicanos or (mexicano OR americano)) or americanos) or mexican) / united states".
• Adding a wildcard symbol may retrieve word variants: (((mexicanos or (mexicano OR americano)) or americanos) or mexican) / united states*.