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 social performance risks."
"improving urban performance risk." » "improving bank performance risk.", "improving loan performance risk.", "improving can performance risk.", "improving urban performance size.", "improving urban performance based.", "improving urban performance _."

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 urban performance risk."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving rural performance risks.") OR ("improving urban performance risk.")).
• Removing quotes may allow a broader search: (( improving rural performance risks. ) or ( improving urban performance risk. )).
• Adding a wildcard symbol may retrieve word variants: (("improving rural performance risks.") or ("improving urban performance risk."))*.