Perhaps you should try some spelling variations:
"improving good performance contract." » "improving good performance contracts.", "improving fund performance contract.", "improving court performance contract.", "improving 2 performance contract.", "improving food performance contract.", "improving blood performance contract.", "improve good performance contract."
"improving indoor performance measures." » "improving outdoor performance measures.", "improving poor performance measures.", "improving donor performance measures.", "improving india's performance measures.", "improving food performance measures.", "improving gender performance measures."

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

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