Perhaps you should try some spelling variations:
"improving rural performance metrics." » "improving rural performance measures.", "improving euract performance metrics.", "improving larval performance metrics.", "improving human performance metrics."
"improving pupil performance contracts." » "improving social performance contracts.", "improving model performance contracts.", "improving judicial performance contracts.", "improving public performance contracts.", "improving civil performance contracts.", "improving audit 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 rural performance metrics.") or ("improving pupil performance contracts."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving rural performance metrics.") OR ("improving pupil performance contracts.")).
• Removing quotes may allow a broader search: (( improving rural performance metrics. ) or ( improving pupil performance contracts. )).
• Adding a wildcard symbol may retrieve word variants: (("improving rural performance metrics.") or ("improving pupil performance contracts."))*.