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 review." » "improving urban performance risk.", "improving urban performance evidence.", "improving bank performance review.", "improving loan performance review.", "improving can performance review."

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

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