Perhaps you should try some spelling variations:
mexicano » mexican, mexicana
americano » americans, america, americas
americanos » americanss, americas, americass, americans, americanus
americana » americans, america, americas
americains » americans, americas, africains

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: (((mexico OR (mexicano OR ((americano OR americana) OR americains))) OR americanos) OR american) / united states.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((mexico or (mexicano or ((americano OR americana) or americains))) or americanos) or american) / united states".
• Adding a wildcard symbol may retrieve word variants: (((mexico or (mexicano or ((americano OR americana) or americains))) or americanos) or american) / united states*.