Perhaps you should try some spelling variations:
"improving co performance contract." » "improving co performance contracts.", "improving ceo performance contract.", "improving do performance contract.", "improving core performance contract.", "improving eco performance contract.", "improving crop performance contract.", "improving ict performance contract."
"improving board performance targets." » "improving court performance targets.", "improving good performance targets.", "improving based performance targets.", "improving food performance targets.", "improving care performance targets.", "improving blood performance targets."

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

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