Perhaps you should try some spelling variations:
"Improving human performance reviews." » "Improving human performance review.", "Improving human performance reports.", "Improving human performance risks.", "Improving loan performance reviews.", "Improving thermal performance reviews.", "Improving animal performance reviews."
"Improving company performance reviews." » "Improving company performance review.", "Improving company performance reports.", "Improving company performance risks.", "Improving country performance reviews.", "Improving loan performance reviews.", "Improving corporate performance reviews."
improving human » improving urban, improving rural

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Improving human performance reviews.") OR ("Improving company performance reviews."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Improving human performance reviews.\") OR (\"Improving company performance reviews.\"))".
• Removing quotes may allow a broader search: (( Improving human performance reviews. ) OR ( Improving company performance reviews. )).
• Adding a wildcard symbol may retrieve word variants: (("Improving human performance reviews.") OR ("Improving company performance reviews."))*.