Perhaps you should try some spelling variations:
"improving basic performance metrics." » "improving basic performance contracts.", "improving basic performance measures.", "improving basic performance contract.", "improving based performance metrics.", "improving bank performance metrics.", "improving seismic performance metrics.", "improving air performance metrics.", "improve basic performance metrics.", "improving public performance metrics."
"improving past performance evidence." » "improving plant performance evidence.", "improving port performance evidence.", "improving based performance evidence.", "improving asset performance evidence.", "improving land performance evidence.", "improving air performance evidence."

Try widening your search to All Fields.

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