Perhaps you should try some spelling variations:
"improving community performance series." » "improving country performance series.", "improving company performance series.", "improving commercial performance series.", "improve community performance series.", "emerging community performance series.", "embracing community performance series.", "improving community performance studies.", "improving community performance size."
"improving social performance measures." » "improving school performance measures.", "improving fiscal performance measures.", "improving financial 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 community performance series.") or ("improving social performance measures."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving community performance series.") OR ("improving social performance measures.")).
• Removing quotes may allow a broader search: (( improving community performance series. ) or ( improving social performance measures. )).
• Adding a wildcard symbol may retrieve word variants: (("improving community performance series.") or ("improving social performance measures."))*.