Perhaps you should try some spelling variations:
"improving urban performance review." » "improving urban performance risk.", "improving urban performance evidence.", "improving bank performance review.", "improving loan performance review.", "improving human performance review."
"improving pupil performance based." » "improving social performance based.", "improving model performance based.", "improving judicial performance based.", "improving public performance based.", "improving civil performance based.", "improving audit 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 pupil performance based.") or ("improving urban performance review."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving pupil performance based.") OR ("improving urban performance review.")).
• Removing quotes may allow a broader search: (( improving pupil performance based. ) or ( improving urban performance review. )).
• Adding a wildcard symbol may retrieve word variants: (("improving pupil performance based.") or ("improving urban performance review."))*.