Perhaps you should try some spelling variations:
"retail businesses books" » "small businesses books", "local businesses books", "retail business books", "retail business book", "retail business yearbooks"
"rural businesses books" » "rural business books", "rural business book", "rural business yearbooks", "local businesses books", "small businesses books"
"gas business case" » "gas business cycle", "gas business climate", "sas business case", "bass business case"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("retail businesses books") OR ("rural businesses books"))) or ("gas business case"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("retail businesses books") OR ("rural businesses books"))) OR ("gas business case")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"retail businesses books\") OR (\"rural businesses books\"))) or (\"gas business case\"))".
• Removing quotes may allow a broader search: (((( retail businesses books ) OR ( rural businesses books ))) or ( gas business case )).
• Adding a wildcard symbol may retrieve word variants: (((("retail businesses books") OR ("rural businesses books"))) or ("gas business case"))*.