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 animal performance review." » "improving annual performance review.", "improving fiscal performance review.", "improving social performance review.", "improving animal performance risk.", "improving animal performance evidence.", "improving criminal performance review.", "improving primary performance review.", "improving climate performance review."

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 metrics.") or ("improving animal performance review."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving thermal performance metrics.") OR ("improving animal performance review."))*.
• Removing quotes may allow a broader search: (( improving thermal performance metrics. ) or ( improving animal performance review. ))*.