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 reports." » "improving social performance measures.", "improving school performance reports.", "improving fiscal performance reports.", "improving financial performance reports."

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

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