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