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 social performance targets." » "improving school performance targets.", "improving fiscal performance targets.", "improving financial performance targets."

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

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