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 thermal performance risks." » "improving external performance risks.", "improving animal performance risks.", "improving erm performance risks.", "improving thermal performance risk."

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