Perhaps you should try some spelling variations:
"retail businesses books" » "rural businesses books", "small businesses books", "local businesses books", "retail business books", "retail business book", "retail business yearbooks"
"mail business cases" » "mail business case", "mail business cycles", "mail business licenses", "small business cases", "retail business cases", "small businesses cases"
"a business costs" » "a business customs", "a business case", "a business centers"

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 cases") or ("retail businesses books"))) or ("a business costs"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mail business cases") OR ("retail businesses books"))) OR ("a business costs")).
• Removing quotes may allow a broader search: (((( mail business cases ) or ( retail businesses books ))) or ( a business costs )).
• Adding a wildcard symbol may retrieve word variants: (((("mail business cases") or ("retail businesses books"))) or ("a business costs"))*.