Perhaps you should try some spelling variations:
"improving land performance contract." » "improving land performance contracts.", "improving plant performance contract.", "improving bank performance contract.", "improving loan performance contract.", "improved land performance contract."
"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 tax performance series.", "improving co performance series.", "improving urban 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 can performance series.") or ("improving land performance contract."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving can performance series.") OR ("improving land performance contract.")).
• Removing quotes may allow a broader search: (( improving can performance series. ) or ( improving land performance contract. )).
• Adding a wildcard symbol may retrieve word variants: (("improving can performance series.") or ("improving land performance contract."))*.