Perhaps you should try some spelling variations:
"improving human performance metrics." » "improving human performance measures.", "improving loan performance metrics.", "improving chain performance metrics."
improving thermal » improving external, improving animal, improving erm
"Improving thermal performance risk." » "Improving thermal performance 2019."

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

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