Perhaps you should try some spelling variations:
"improving safety performance metrics." » "improving safety performance contracts.", "improving safety performance measures.", "improving safety performance contract.", "improving market performance metrics.", "improving key performance metrics.", "improving quality performance metrics.", "improving water performance metrics."
"improving past performance based." » "improving past performance measures.", "improving plant performance based.", "improving port performance based.", "improving based performance based.", "improving basic performance based.", "improving asset performance based.", "improving land performance based."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving safety performance metrics.") or ("improving past performance based."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving safety performance metrics.") OR ("improving past performance based."))*.
• Removing quotes may allow a broader search: (( improving safety performance metrics. ) or ( improving past performance based. ))*.