Perhaps you should try some spelling variations:
"improving local performance series." » "improving local performance metrics.", "improving local performance reviews.", "improving local performance targets.", "improving social performance series.", "improving loan performance series.", "improving fiscal performance series.", "improving global performance series."
"improving mental performance review." » "improving senegal performance review.", "improving annual performance review.", "improving entry performance review.", "improving mental performance risk.", "improving mental performance evidence.", "improving maternal performance review.", "improving social performance review.", "improving rural 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 local performance series.") or ("improving mental performance review."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving local performance series.") OR ("improving mental performance review."))*.
• Removing quotes may allow a broader search: (( improving local performance series. ) or ( improving mental performance review. ))*.