Perhaps you should try some spelling variations:
"improving overall performance based." » "improving average performance based.", "improving thermal performance based.", "improving governance performance based.", "improving coverage performance based.", "improving rural performance based.", "improving poverty performance based.", "improving overall performance measures."
"improving urban performance evidence." » "improving bank performance evidence.", "improving loan performance evidence.", "improving can performance evidence."

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