Perhaps you should try some spelling variations:
"improving poor performance metrics." » "improving poor performance measures.", "improving sector performance metrics.", "improving power performance metrics.", "improving food performance metrics.", "improving peer performance metrics."
"improving good performance metrics." » "improving good performance measures.", "improving fund performance metrics.", "improving court performance metrics.", "improving 2 performance metrics.", "improving food performance metrics.", "improving blood performance metrics.", "improve good performance metrics."

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

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