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 team performance evidence." » "improving firm performance evidence.", "improving teacher performance evidence.", "improving thermal performance evidence.", "improving tax performance evidence.", "improving eap performance evidence.", "improving erm performance evidence."

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