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 reviews.") or ("improving human performance metrics."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("Improving human performance reviews.") OR ("improving human performance metrics."))*.
• Removing quotes may allow a broader search: (( Improving human performance reviews. ) or ( improving human performance metrics. ))*.