Perhaps you should try some spelling variations:
"improving human performance metrics." » "improving human performance contracts.", "improving human performance measures.", "improving human performance contract.", "improving loan performance metrics.", "improving thermal performance metrics.", "improving company performance metrics.", "improving urban performance metrics."
"improving rural performance metrics." » "improving rural performance contracts.", "improving rural performance measures.", "improving rural performance contract.", "improving pupil performance metrics.", "improving thermal performance metrics.", "improving overall performance metrics.", "improving urban performance metrics.", "improving social performance metrics."

Try widening your search to All Fields.

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