Perhaps you should try some spelling variations:
"improve care performance risk." » "improve care performance size.", "improve care performance based.", "improve care performance _.", "improve market performance risk.", "improve trade performance risk.", "improve court performance risk.", "improve water performance risk.", "improve early performance risk.", "improve state performance risk."
"improving port performance evidence." » "improving export performance evidence.", "improving court performance evidence.", "improving plant performance evidence.", "improving poverty performance evidence.", "improving birth performance evidence."

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

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