Perhaps you should try some spelling variations:
"improving urban performance evidence." » "improving bank performance evidence.", "improving loan performance evidence.", "improving can performance evidence."
"improving pupil performance based." » "improving social performance based.", "improving fund performance based.", "improving judicial performance based.", "improving pupil performance measures.", "improving public performance based.", "improving supply performance based.", "improving rural performance based."

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

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