Perhaps you should try some spelling variations:
"improved plant performance reports." » "improved port performance reports.", "improved court performance reports.", "improved land performance reports.", "improves implant performance reports.", "improved infant performance reports.", "improved plant performance report."
"improving und performance risks." » "improving und performance risk.", "improving fund performance risks.", "improving funds performance risks.", "improving good performance risks.", "improving food performance risks.", "improving burn performance risks.", "improving feed performance risks."

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

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