Perhaps you should try some spelling variations:
"improving do performance contract." » "improving do performance contracts.", "improving di performance contract.", "improving 2 performance contract.", "improving 3 performance contract.", "improving co performance contract.", "improving eco performance contract.", "improving pro performance contract."
"improving total performance review." » "improving total performance risk.", "improving total performance evidence.", "improving tool performance review.", "improving social performance review.", "improving global performance review.", "improving mental performance review.", "improving data performance review."

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

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