Perhaps you should try some spelling variations:
"improving regional performance metrics." » "improving operational performance metrics.", "improving fiscal performance metrics.", "improving social performance metrics.", "improving regional performance contracts.", "improving regional performance contract.", "improving global performance metrics.", "improving criminal performance metrics.", "improving nutritional performance metrics."
"improving thermal performance measures." » "improving maternal performance measures.", "improving rural performance measures.", "improving human performance measures."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving regional performance metrics.") or ("improving thermal performance measures."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving regional performance metrics.") OR ("improving thermal performance measures.")).
• Removing quotes may allow a broader search: (( improving regional performance metrics. ) or ( improving thermal performance measures. )).
• Adding a wildcard symbol may retrieve word variants: (("improving regional performance metrics.") or ("improving thermal performance measures."))*.