Perhaps you should try some spelling variations:
"improving city performance reviews." » "improving city performance reports.", "improving city performance risks.", "improving city performance results.", "improving city performance evidences.", "improving key performance reviews.", "improving utility performance reviews.", "improving safety performance reviews.", "improving eitc performance reviews.", "improving equity performance reviews.", "improving birth performance reviews."
"improving country performance review." » "improving country performance risk.", "improving country performance evidence.", "improving voluntary performance review.", "importing country performance review.", "improving community 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 city performance reviews.") or ("improving country performance review."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving city performance reviews.") OR ("improving country performance review.")).
• Removing quotes may allow a broader search: (( improving city performance reviews. ) or ( improving country performance review. )).
• Adding a wildcard symbol may retrieve word variants: (("improving city performance reviews.") or ("improving country performance review."))*.