Perhaps you should try some spelling variations:
"mail business costs" » "mail business customs", "mail business centers", "small business costs", "retail business costs", "small businesses costs"
"mail business cases" » "mail business cycles", "mail business licenses", "mail business climates", "small business cases", "retail business cases", "small businesses cases"
"based business case" » "based businesses case", "bass business case", "owned business case", "based business cycle", "based business climate"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("mail business costs") OR ("mail business cases"))) or ("based business case"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mail business costs") OR ("mail business cases"))) OR ("based business case"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"mail business costs\") OR (\"mail business cases\"))) or (\"based business case\"))*".
• Removing quotes may allow a broader search: (((( mail business costs ) OR ( mail business cases ))) or ( based business case ))*.