Perhaps you should try some spelling variations:
"puerto rice" » "puerto rich", "puerto rise"
"puerto rico's" » "puerto rich's", "puerto rio's", "puerto rica's"
"puerto rico" » "puerto rich", "puerto rio", "puerto rica"
"puerto ricans" » "puerto africans", "puerto ricas"
"puerto rican" » "puerto rica"

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: (((((("puerto rice") OR ("puerto rico's"))) OR ((("puerto ricans") OR ("puerto rican"))))) OR ("puerto rico")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"puerto rice\") or (\"puerto rico's\"))) or (((\"puerto ricans\") OR (\"puerto rican\"))))) or (\"puerto rico\"))".
• Removing quotes may allow a broader search: (((((( puerto rice ) or ( puerto rico's ))) or ((( puerto ricans ) OR ( puerto rican ))))) or ( puerto rico )).
• Adding a wildcard symbol may retrieve word variants: (((((("puerto rice") or ("puerto rico's"))) or ((("puerto ricans") OR ("puerto rican"))))) or ("puerto rico"))*.