Perhaps you should try some spelling variations:
"improving rural performance series." » "improving rural performance metrics.", "improving rural performance reviews.", "improving rural performance targets.", "improving pupil performance series.", "improving thermal performance series.", "improving overall performance series.", "improving urban performance series.", "improving social performance series."
"improving rural performance review." » "improving rural performance risk.", "improving rural performance evidence.", "improving pupil performance review.", "improving thermal performance review.", "improving overall performance review.", "improving urban performance review.", "improving social 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 rural performance series.") or ("improving rural performance review."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving rural performance series.") OR ("improving rural performance review.")).
• Removing quotes may allow a broader search: (( improving rural performance series. ) or ( improving rural performance review. )).
• Adding a wildcard symbol may retrieve word variants: (("improving rural performance series.") or ("improving rural performance review."))*.