Perhaps you should try some spelling variations:
"improving social performance reviews." » "improving social performance review.", "improving social performance reports.", "improving social performance risks.", "improving school performance reviews.", "improving fiscal performance reviews.", "improving financial performance reviews."
"improving rural performance series." » "improving rural performance metrics.", "improving rural performance review.", "improving rural performance targets.", "improving pupil performance series.", "improving thermal performance series.", "improving overall performance series.", "improving urban performance series."

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