Perhaps you should try some spelling variations:
"improving trade performance reviews." » "improving trade performance review.", "improving trade performance reports.", "improving trade performance risks.", "improving care performance reviews.", "improving tax performance reviews.", "improving teacher performance reviews."
"improving power performance contracts." » "improving poor performance contracts.", "improving worker performance contracts.", "improving core performance contracts.", "improving peer performance contracts.", "improving sewer performance contracts."

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

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