Perhaps you should try some spelling variations:
"improving contract performance metrics." » "improving country performance metrics.", "improving court performance metrics.", "improving corporate performance metrics.", "improving contract performance contracts.", "improving contract performance measures.", "improving contract performance contract.", "improve contract performance metrics.", "improving central performance metrics.", "improving coverage performance metrics."
"improving air performance targets." » "improving firm performance targets.", "improving a performance targets.", "improving ii performance targets.", "improving water performance targets.", "improving land performance targets.", "improving _ 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 contract performance metrics.") or ("improving air performance targets."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving contract performance metrics.") OR ("improving air performance targets."))*.
• Removing quotes may allow a broader search: (( improving contract performance metrics. ) or ( improving air performance targets. ))*.