Perhaps you should try some spelling variations:
business partners » business owners, business process
partners series » matters series, exporters series, importers series
business case » business cycle, business climate
short guides » short guide
case series » care series, cass series, case stories

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( short guides to business case series. ) or ( Short guides to business partners series. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( short guides to business case series. ) OR ( Short guides to business partners series. )).
• Adding a wildcard symbol may retrieve word variants: (( short guides to business case series. ) or ( Short guides to business partners series. ))*.