Perhaps you should try some spelling variations:
"improving laws performance metrics." » "improving laws performance measures.", "improving als performance metrics.", "improving has performance metrics.", "improving news performance metrics.", "improving land performance metrics.", "improving lts performance metrics.", "improving labor performance metrics."
"improving past performance reviews." » "improving past performance review.", "improving past performance reports.", "improving past performance risks.", "improving plant performance reviews.", "improving port performance reviews.", "improving transit performance reviews.", "improving fast performance reviews.", "improving post performance reviews."

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

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