Perhaps you should try some spelling variations:
"improving based performance series." » "improving based performance metrics.", "improving based performance reviews.", "improving based performance review.", "improving bank performance series.", "improving care performance series.", "improving board performance series.", "improving basic performance series.", "improving water performance series.", "improving land performance series."
"improving shared performance based." » "improving sharia performances based.", "improving care performance based.", "improving board performance based.", "improving shared performance measures.", "improving water performance based.", "improving land performance based.", "improving safety performance based."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving based performance series.") or ("improving shared performance based."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving based performance series.") OR ("improving shared performance based."))*.
• Removing quotes may allow a broader search: (( improving based performance series. ) or ( improving shared performance based. ))*.