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