Perhaps you should try some spelling variations:
"improving criminal performance metrics." » "improving critical performances metrics.", "improving regional performance metrics.", "improving animal performance metrics.", "improving criminal performance measures.", "improving critical performance metrics.", "improving civil performance metrics."
"improving overall performance metrics." » "improving overall performance measures.", "improving average performance metrics.", "improving thermal performance metrics.", "improving governance performance metrics.", "improving coverage performance metrics.", "improving rural performance metrics.", "improving federal 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 criminal performance metrics.") or ("improving overall performance metrics."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving criminal performance metrics.") OR ("improving overall performance metrics.")).
• Removing quotes may allow a broader search: (( improving criminal performance metrics. ) or ( improving overall performance metrics. )).
• Adding a wildcard symbol may retrieve word variants: (("improving criminal performance metrics.") or ("improving overall performance metrics."))*.