Perhaps you should try some spelling variations:
"improving rural performance risks." » "improving pupil performance risks.", "improving thermal performance risks.", "improving overall performance risks.", "improving rural performance issues.", "improving rural performance based.", "improving rural performance size.", "improving rural performance sizes.", "improving rural performance baseds.", "improving rural performance _s.", "improving urban performance risks.", "improving social performance risks."
"improving can performance risk." » "improving can performance size.", "improving can performance based.", "improving can performance _.", "improving bank performance risk.", "improving loan performance risk.", "improving care performance risk.", "improving land performance risk.", "improving tax performance risk.", "improving co 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 rural performance risks.") or ("improving can performance risk."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving rural performance risks.") OR ("improving can performance risk.")).
• Removing quotes may allow a broader search: (( improving rural performance risks. ) or ( improving can performance risk. )).
• Adding a wildcard symbol may retrieve word variants: (("improving rural performance risks.") or ("improving can performance risk."))*.