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 can performance review."
"improving thermal performance review." » "improving thermal performance risk.", "improving thermal performance evidence.", "improving maternal performance review.", "improving rural performance review.", "improving human performance review."

Try widening your search to All Fields.

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