Perhaps you should try some spelling variations:
"informal business case" » "internal business case", "information business case", "informal business cycle", "informal business climate"
"farm business books" » "farm business book", "farm business handbooks", "farm business yearbooks", "forum business books", "from business books", "core business books"
"term business hours" » "german business hours", "forum business hours", "water business hours"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("informal business case") or ((("farm business books") or ("term business hours"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("informal business case") OR ((("farm business books") OR ("term business hours")))).
• Removing quotes may allow a broader search: (( informal business case ) or ((( farm business books ) or ( term business hours )))).
• Adding a wildcard symbol may retrieve word variants: (("informal business case") or ((("farm business books") or ("term business hours"))))*.