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