Perhaps you should try some spelling variations:
"improving local performance series." » "improving local performance metrics.", "improving local performance reviews.", "improving local performance review.", "improving social performance series.", "improving loan performance series.", "improving fiscal performance series.", "improving global performance series."
"improving poor performance risks." » "improving poor performance risk.", "improving poor performance issues.", "improving poor performance based.", "improving export performance risks.", "improving sector performance risks.", "improving _ performance risks.", "improving power performance risks.", "improving food performance risks.", "improving indoor performance risks."

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 poor performance risks."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving local performance series.") OR ("improving poor performance risks."))*.
• Removing quotes may allow a broader search: (( improving local performance series. ) or ( improving poor performance risks. ))*.