Perhaps you should try some spelling variations:
"improving urban performance series." » "improving urban performance metrics.", "improving urban performance reviews.", "improving urban performance review.", "improving bank performance series.", "improving loan performance series.", "improving can performance series."
"improving urban performance risk." » "improving bank performance risk.", "improving loan performance risk.", "improving can performance risk.", "improving urban performance size.", "improving urban performance based.", "improving urban performance _."

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