Perhaps you should try some spelling variations:
"costs price" » "costs prices", "costly price", "tests price"
"cost prices" » "cost process", "best prices", "lowest prices", "just prices", "list prices"
"costa rice" » "costa rican", "costa ricas", "costa rita"
"cost price" » "just price", "list price", "lowest price"
"costa rica" » "costa rich", "costa rita"

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 rice") OR ("cost price"))) OR ((("costs price") OR ("cost prices"))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"costa rica\") or (((((\"costa rice\") or (\"cost price\"))) or (((\"costs price\") OR (\"cost prices\"))))))*".
• Removing quotes may allow a broader search: (( costa rica ) or ((((( costa rice ) or ( cost price ))) or ((( costs price ) OR ( cost prices ))))))*.