Perhaps you should try some spelling variations:
"improving urban performance measures." » "improving bank performance measures.", "improving loan performance measures.", "improving human performance measures."
"improving based performance based." » "improving board performance based.", "improving fund performance based.", "improving good performance based.", "improving basic performance based.", "improving care performance based.", "improving asset 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 measures.") or ("improving based performance based."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving urban performance measures.") OR ("improving based performance based.")).
• Removing quotes may allow a broader search: (( improving urban performance measures. ) or ( improving based performance based. )).
• Adding a wildcard symbol may retrieve word variants: (("improving urban performance measures.") or ("improving based performance based."))*.