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 can performance series.", "improving a performance series."
"improving loan performance series." » "improving loan performance metrics.", "improving loan performance reviews.", "improving loan performance review.", "improving poor performance series.", "improving bank performance series.", "improving _ performance series.", "improving local performance series.", "improving land performance series.", "improving road performance series."

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 loan performance series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving urban performance series.\") OR (\"improving loan performance series.\"))".
• Removing quotes may allow a broader search: (( improving urban performance series. ) OR ( improving loan performance series. )).
• Adding a wildcard symbol may retrieve word variants: (("improving urban performance series.") OR ("improving loan performance series."))*.