Perhaps you should try some spelling variations:
"improving thermal performance reviews." » "improving thermal performance review.", "improving thermal performance reports.", "improving thermal performance risks.", "improving maternal performance reviews.", "improving rural performance reviews.", "improving human performance reviews."
"improving loan performance measures." » "improving poor performance measures.", "improving bank performance measures.", "improving _ performance measures.", "improving local performance measures.", "improving land performance measures.", "improving road performance measures."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("improving thermal performance reviews.") or ("improving loan performance measures."))~.
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