Perhaps you should try some spelling variations:
"improving company performance metrics." » "improving company performance measures.", "improving company performance contract.", "improving country performance metrics.", "improving loan performance metrics.", "improving corporate performance metrics.", "improving human performance metrics."
"improving thermal performance contracts." » "improving maternal performance contracts.", "improving rural performance contracts.", "improving human performance contracts."

Try widening your search to All Fields.

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