Perhaps you should try some spelling variations:
"improving social performance metrics." » "improving social performance contracts.", "improving social performance measures.", "improving social performance contract.", "improving school performance metrics.", "improving fiscal performance metrics.", "improving financial performance metrics."
"improving rural performance series." » "improving rural performance reviews.", "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 metrics."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving rural performance series.") OR ("improving social performance metrics.")).
• Removing quotes may allow a broader search: (( improving rural performance series. ) or ( improving social performance metrics. )).
• Adding a wildcard symbol may retrieve word variants: (("improving rural performance series.") or ("improving social performance metrics."))*.