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