Perhaps you should try some spelling variations:
"costa ricas" » "costa rica's", "costa ritas"
"costa rich" » "costa rita", "costa rica's", "costa ricans"
"costa rice" » "costs price", "cost price", "costa rita"
"costa rica" » "costa rita"
"costa rican" » "costa ritan"

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