Perhaps you should try some spelling variations:
"improving co performance metrics." » "improving co performance measures.", "improving ceo performance metrics.", "improving do performance metrics.", "improving core performance metrics.", "improving eco performance metrics.", "improving crop performance metrics.", "improving ict performance metrics."
"improving care performance reviews." » "improving care performance review.", "improving care performance reports.", "improving care performance risks.", "improving trade performance reviews.", "improving drive performance reviews.", "improving 2 performance reviews.", "improving early performance reviews.", "improving air performance reviews.", "improving data performance reviews."

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

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