Perhaps you should try some spelling variations:
"improving job performance metrics." » "improving job performance contracts.", "improving job performance measures.", "improving job performance contract.", "improving poor performance metrics.", "improving loan performance metrics.", "improving port performance metrics.", "improving co performance metrics.", "improving food performance metrics.", "improving road performance metrics."
"improving upper performance reviews." » "improving upper performance review.", "improving upper performance reports.", "improving upper performance risks.", "improving under performance reviews.", "improving support performance reviews.", "improving poor performance reviews.", "improving supply performance reviews.", "improving water performance reviews.", "improving power 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 upper performance reviews.") or ("improving job performance metrics."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving upper performance reviews.") OR ("improving job performance metrics.")).
• Removing quotes may allow a broader search: (( improving upper performance reviews. ) or ( improving job performance metrics. )).
• Adding a wildcard symbol may retrieve word variants: (("improving upper performance reviews.") or ("improving job performance metrics."))*.