Perhaps you should try some spelling variations:
"improving poor performance metrics." » "improving poor performance measures.", "improving sector performance metrics.", "improving power performance metrics.", "improving food performance metrics.", "improving peer performance metrics."
"improving export performance series." » "improving export performance studies.", "improving export performance size.", "improving exposure performance series.", "improving eap performance series.", "improving eco 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 export performance series.") or ("improving poor performance metrics."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving export performance series.") OR ("improving poor performance metrics.")).
• Removing quotes may allow a broader search: (( improving export performance series. ) or ( improving poor performance metrics. )).
• Adding a wildcard symbol may retrieve word variants: (("improving export performance series.") or ("improving poor performance metrics."))*.