Perhaps you should try some spelling variations:
"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."
"improving city performance evidence." » "improving firm performance evidence.", "improving high performance evidence.", "improving key performance evidence.", "improving its performance evidence.", "improving equity performance evidence.", "improving birth performance evidence."

You may be able to get more results by adjusting your search query.

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