Perhaps you should try some spelling variations:
"retail business hours" » "retail businesses hours", "rural business hours", "central business hours"
"basic business costs" » "bass business costs", "asia business costs", "based business costs", "basic business cases", "basic business customs", "basic business case"
"mail business books" » "mail business book", "mail business handbooks", "mail business yearbooks", "small business books", "small businesses books"

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 books") OR ((("basic business costs") OR ("retail business hours"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"mail business books\") OR (((\"basic business costs\") OR (\"retail business hours\"))))*".
• Removing quotes may allow a broader search: (( mail business books ) OR ((( basic business costs ) OR ( retail business hours ))))*.