Perhaps you should try some spelling variations:
"improving global performance metrics." » "improving global performance measures.", "improving total performance metrics.", "improving regional performance metrics.", "improving general performance metrics.", "improving fiscal performance metrics.", "improving growth performance metrics.", "providing global performance metrics."
"improving human performance series." » "improving human performance studies.", "improving human performance size.", "improving loan performance series.", "improving thermal performance series.", "improving chain performance series."

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