Perhaps you should try some spelling variations:
"improving urban performance series." » "improving urban performance studies.", "improving urban performance size.", "improving bank performance series.", "improving human performance series.", "improving can performance series."
"improving loan performance review." » "improving loan performance risk.", "improving loan performance evidence.", "improving local performance review.", "improving land performance review.", "improving lead 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 urban performance series.") or ("improving loan performance review."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving urban performance series.") OR ("improving loan performance review.")).
• Removing quotes may allow a broader search: (( improving urban performance series. ) or ( improving loan performance review. )).
• Adding a wildcard symbol may retrieve word variants: (("improving urban performance series.") or ("improving loan performance review."))*.