Perhaps you should try some spelling variations:
"improving country performance metrics." » "improving country performance measures.", "improving country performance contract.", "improving voluntary performance metrics.", "importing country performance metrics.", "borrowing country performance metrics."
"improving rural performance contracts." » "improving pupil performance contracts.", "improving thermal performance contracts.", "improving overall performance contracts.", "improving urban performance contracts.", "improving social performance contracts."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving country performance metrics.") or ("improving rural performance contracts."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving country performance metrics.") OR ("improving rural performance contracts."))*.
• Removing quotes may allow a broader search: (( improving country performance metrics. ) or ( improving rural performance contracts. ))*.