Perhaps you should try some spelling variations:
"improving public performance targets." » "improving music performance targets.", "improving policy performance targets."
"improving pupil performance measures." » "improving social performance measures.", "improving model performance measures.", "improving judicial performance measures.", "improving civil performance measures.", "improving audit performance measures.", "improving fuel performance measures."

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

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