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