Perhaps you should try some spelling variations:
"scheduling modeling uncertainty" » "scheduling model uncertainty", "scheduling models uncertainty", "scheduling meetings uncertainty"
"scheduling managing uncertainty" » "scheduling handling uncertainty", "schedule managing uncertainty", "scheduler managing uncertainty"

Try widening your search to All Fields.

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: (("scheduling managing uncertainty") OR ("scheduling modeling uncertainty")).
• Removing quotes may allow a broader search: (( scheduling managing uncertainty ) or ( scheduling modeling uncertainty )).
• Adding a wildcard symbol may retrieve word variants: (("scheduling managing uncertainty") or ("scheduling modeling uncertainty"))*.