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 targets." » "improving social performance targets.", "improving model performance targets.", "improving judicial performance targets.", "improving public performance targets.", "improving civil performance targets.", "improving audit performance targets."

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

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