Perhaps you should try some spelling variations:
"improving thermal performance reviews." » "improving thermal performance review.", "improving thermal performance reports.", "improving thermal performance risks.", "improving external performance reviews.", "improving animal performance reviews.", "improving erm performance reviews."
"improving export performance measures." » "improving exposure performance measures.", "improving eap performance measures.", "improving eco 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 reviews.") or ("improving export performance measures."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving thermal performance reviews.") OR ("improving export performance measures.")).
• Removing quotes may allow a broader search: (( improving thermal performance reviews. ) or ( improving export performance measures. )).
• Adding a wildcard symbol may retrieve word variants: (("improving thermal performance reviews.") or ("improving export performance measures."))*.