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

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

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