Perhaps you should try some spelling variations:
"improving public performance risk." » "improving building performance risk.", "improving specific performance risk.", "improving quality performance risk.", "improving public performance size.", "improving public performance based.", "improving public performance _."
"improving board performance risk." » "improving poor performance risk.", "improving bank performance risk.", "improving loan performance risk.", "improving board performance size.", "improving board performance based.", "improving board performance _.", "improving road performance risk.", "improving shared performance risk.", "improving land performance risk."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving public performance risk.") OR ("improving board performance risk."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving public performance risk.\") OR (\"improving board performance risk.\"))".
• Removing quotes may allow a broader search: (( improving public performance risk. ) OR ( improving board performance risk. )).
• Adding a wildcard symbol may retrieve word variants: (("improving public performance risk.") OR ("improving board performance risk."))*.