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 review." » "improving pupil performance risk.", "improving pupil performance evidence.", "improving social performance review.", "improving model performance review.", "improving judicial performance review.", "improving public performance review.", "improving civil performance review.", "improving audit performance review."

Try widening your search to All Fields.

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