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