Perhaps you should try some spelling variations:
"improving thermal performance metrics." » "improving thermal performance contracts.", "improving thermal performance measures.", "improving thermal performance contract.", "improving maternal performance metrics.", "improving rural performance metrics.", "improving human performance metrics."
"improving loan performance review." » "improving loan performance risk.", "improving loan performance evidence.", "improving poor performance review.", "improving bank performance review.", "improving _ performance review.", "improving local performance review.", "improving land performance review.", "improving road performance review."

Try widening your search to All Fields.

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