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