Perhaps you should try some spelling variations:
"based businesses firm" » "based business firm", "owned businesses firm", "new businesses firm", "based businesses from", "based business firms", "based businesses dsm"
"gas business books" » "gas business book", "gas business handbooks", "gas business yearbooks", "sas business books", "bass business books"
"mail business hours" » "small business hours", "retail business hours", "small businesses hours"

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: (("gas business books") OR ((("based businesses firm") OR ("mail business hours"))))~.
• Removing quotes may allow a broader search: (( gas business books ) or ((( based businesses firm ) or ( mail business hours ))))~.
• Adding a wildcard symbol may retrieve word variants: (("gas business books") or ((("based businesses firm") or ("mail business hours"))))*.