Perhaps you should try some spelling variations:
"improving country performance review." » "improving country performance risk.", "improving voluntary performance review.", "importing country performance review.", "borrowing country performance review."
"improving bank performance evidence." » "improving market performance evidence.", "improving _ performance evidence.", "improving firm performance evidence.", "improving land performance evidence.", "improving urban performance evidence.", "improving basic 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 country performance review.") OR ("improving bank performance evidence."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving country performance review.\") OR (\"improving bank performance evidence.\"))".
• Removing quotes may allow a broader search: (( improving country performance review. ) OR ( improving bank performance evidence. )).
• Adding a wildcard symbol may retrieve word variants: (("improving country performance review.") OR ("improving bank performance evidence."))*.