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 urban performance series." » "improving urban performance studies.", "improving urban performance size.", "improving bank performance series.", "improving loan performance series.", "improving human performance series."

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