Perhaps you should try some spelling variations:
"improving can performance series." » "improving can performance metrics.", "improving can performance reviews.", "improving can performance review.", "improving bank performance series.", "improving loan performance series.", "improving care performance series.", "improving land performance series.", "improving tax performance series.", "improving co performance series."
"improving food performance contracts." » "improving good performance contracts.", "improving poor performance contracts.", "improving fund performance contracts.", "improving land performance contracts."

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

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