Perhaps you should try some spelling variations:
"improving human performance reviews." » "improving human performance review.", "improving human performance reports.", "improving human performance risks.", "improving loan performance reviews.", "improving thermal performance reviews.", "improving chain performance reviews."
"Improving human performance metrics." » "Improving human performance measures.", "Improving loan performance metrics.", "Improving thermal performance metrics.", "Improving chain 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 human performance metrics.") or ("improving human performance reviews."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("Improving human performance metrics.") OR ("improving human performance reviews."))*.
• Removing quotes may allow a broader search: (( Improving human performance metrics. ) or ( improving human performance reviews. ))*.