Perhaps you should try some spelling variations:
"improving food performance series." » "improving food performance metrics.", "improving food performance reviews.", "improving food performance review.", "improving good performance series.", "improving poor performance series.", "improving fund performance series.", "improving land performance series."
"improving loan performance risk." » "improving poor performance risk.", "improving bank performance risk.", "improving _ performance risk.", "improving loan performance size.", "improving loan performance based.", "improving loan performance _.", "improving local performance risk.", "improving land performance risk.", "improving road 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 loan performance risk.") or ("improving food performance series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving loan performance risk.") OR ("improving food performance series.")).
• Removing quotes may allow a broader search: (( improving loan performance risk. ) or ( improving food performance series. )).
• Adding a wildcard symbol may retrieve word variants: (("improving loan performance risk.") or ("improving food performance series."))*.