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 performance review." » "Improving thermal performance risk.", "Improving thermal performance evidence."
improving thermal » improving external, improving animal, improving erm

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 review.") OR ("improving human performance metrics."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Improving thermal performance review.\") OR (\"improving human performance metrics.\"))".
• Removing quotes may allow a broader search: (( Improving thermal performance review. ) OR ( improving human performance metrics. )).
• Adding a wildcard symbol may retrieve word variants: (("Improving thermal performance review.") OR ("improving human performance metrics."))*.