Perhaps you should try some spelling variations:
"improving thermal performance reports." » "improving external performance reports.", "improving animal performance reports.", "improving erm performance reports.", "improving thermal performance report."
"improving poor performance measures." » "improving sector performance measures.", "improving power performance measures.", "improving food performance measures.", "improving peer performance measures."

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