Perhaps you should try some spelling variations:
"improving larval performance series." » "improving larval performance studies.", "improving larval performance size.", "improving level performance series.", "improving maximal performance series.", "improving fiscal performance series.", "improving local performance series.", "improving legal performance series.", "improving land performance series."
"improving thermal performance review." » "improving thermal performance risk.", "improving thermal performance evidence.", "improving external performance review.", "improving animal performance review.", "improving erm 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 larval performance series.") or ("improving thermal performance review."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving larval performance series.") OR ("improving thermal performance review."))*.
• Removing quotes may allow a broader search: (( improving larval performance series. ) or ( improving thermal performance review. ))*.