Perhaps you should try some spelling variations:
"costa rica's" » "costa rican"
"costa ricas" » "costa rican"
"costa rita" » "costa rican", "costa rosa"
"costa rich" » "costa rican", "costa ricans"

Try widening your search to All Fields.

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: (((((("costa rica") OR ("costa rita"))) OR ((("costa rich") OR ("costa rica's"))))) OR ("costa ricas")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"costa rica\") or (\"costa rita\"))) or (((\"costa rich\") OR (\"costa rica's\"))))) or (\"costa ricas\"))".
• Removing quotes may allow a broader search: (((((( costa rica ) or ( costa rita ))) or ((( costa rich ) OR ( costa rica's ))))) or ( costa ricas )).
• Adding a wildcard symbol may retrieve word variants: (((((("costa rica") or ("costa rita"))) or ((("costa rich") OR ("costa rica's"))))) or ("costa ricas"))*.