Perhaps you should try some spelling variations:
"improving food performance review." » "improving food performance risk.", "improving food performance evidence.", "improving good performance review.", "improving poor performance review.", "improving fund performance review.", "improving land performance review."
"improving loan performance series." » "improving loan performance metrics.", "improving loan performance reviews.", "improving loan performance targets.", "improving poor performance series.", "improving bank performance series.", "improving _ performance series.", "improving local performance series.", "improving land performance series.", "improving road performance series."

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