Perhaps you should try some spelling variations:
"improving shared performance based." » "improving sharia performances based.", "improving sharing performance based.", "improving care performance based.", "improving stored performance based.", "improving sales performance based."
"improving firms performance risk." » "improving firm performance risk.", "improving firm performances risk.", "improving funds performance risk.", "improving firms performance 2019.", "improving farmers performance risk.", "importing firms performance risk.", "improving air performance risk."

Try widening your search to All Fields.

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

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