Perhaps you should try some spelling variations:
"improving urban performance based." » "improving bank performance based.", "improving loan performance based.", "improving can performance based.", "improving urban performance measures."
"improving co performance risk." » "improving co performance size.", "improving co performance _.", "improving co performance data.", "improving do performance risk.", "improving crop performance risk.", "improving job performance risk.", "improving _ performance risk.", "improving macro performance risk.", "improving food performance risk."

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