Perhaps you should try some spelling variations:
"importing firms performance risk." » "importing firm performance risk.", "importing firm performances risk.", "importing funds performance risk.", "importing firms performance 2019.", "important firms performance risk.", "reporting firms performance risk.", "exporting firms performance risk."
"improving sector performance evidence." » "improve sector performance evidence.", "improving eco performance evidence.", "improving sewer 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: (("importing firms performance risk.") or ("improving sector performance evidence."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("importing firms performance risk.") OR ("improving sector performance evidence."))*.
• Removing quotes may allow a broader search: (( importing firms performance risk. ) or ( improving sector performance evidence. ))*.