Perhaps you should try some spelling variations:
"improving coverage performance measures." » "improving average performance measures.", "improving overall performance measures.", "improving governance performance measures.", "improved coverage performance measures.", "improves coverage performance measures."
"improving lead performance evidence." » "improving end performance evidence.", "improving esd performance evidence.", "improving reward performance evidence.", "improving legal performance evidence.", "improving land performance evidence.", "improving eap performance evidence."

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

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