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