Perhaps you should try some spelling variations:
"improving urban performance contracts." » "improving bank performance contracts.", "improving loan performance contracts.", "improving can performance contracts."
"improving plant performance evidence." » "improving bank performance evidence.", "improving loan performance evidence.", "improving port performance evidence.", "improving land performance evidence.", "improving laws performance evidence.", "improving payment performance evidence."

Try widening your search to All Fields.

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

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