Perhaps you should try some spelling variations:
"improving overall performance metrics." » "improving average performance metrics.", "improving thermal performance metrics.", "improving governance performance metrics.", "improving overall performance contracts.", "improving overall performance measures.", "improving overall performance contract.", "improving coverage performance metrics.", "improving rural performance metrics.", "improving poverty performance metrics."
"improving human performance based." » "improving loan performance based.", "improving thermal performance based.", "improving company performance based.", "improving human performance measures.", "improving urban performance based.", "improving rural performance based."

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