Perhaps you should try some spelling variations:
"improving community performance review." » "improving country performance review.", "improving company performance review.", "improving commercial performance review.", "improve community performance review.", "emerging community performance review.", "embracing community performance review.", "improving community performance risk.", "improving community performance evidence."
"improving social performance series." » "improving school performance series.", "improving fiscal performance series.", "improving financial performance series.", "improving social performance studies.", "improving social performance size."

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