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

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