Perhaps you should try some spelling variations:
"improving baseline performance measures." » "improving baldrige performance measures.", "improving based performance measures.", "improving basic performance measures.", "improving modeling performance measures.", "improving vaccine performance measures."
"improving public performance targets." » "improving music performance targets.", "improving policy performance targets."

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