Perhaps you should try some spelling variations:
"improving can performance risks." » "improving can performance risk.", "improving chain performance risks.", "improving loan performance risks.", "improving human performance risks.", "improving care performance risks.", "improving a performance risks.", "improving co performance risks."
"improving crop performance measures." » "improving group performance measures.", "improving top performance measures.", "improving do performance measures.", "improving co performance measures.", "improving pro performance measures.", "improving macro performance measures."

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 can performance risks.") or ("improving crop performance measures."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving can performance risks.") OR ("improving crop performance measures.")).
• Removing quotes may allow a broader search: (( improving can performance risks. ) or ( improving crop performance measures. )).
• Adding a wildcard symbol may retrieve word variants: (("improving can performance risks.") or ("improving crop performance measures."))*.