Perhaps you should try some spelling variations:
"improving business performance risk." » "improve business performance risk.", "exploring business performance risk.", "emerging business performance risk.", "improving business performance 2019."
"improving eco performance evidence." » "improving do performance evidence.", "improving ceo performance evidence.", "improving core performance evidence.", "improving co performance evidence.", "improving e performance evidence.", "improving eap performance evidence."

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

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