Steps
Navigate to the Notifications page from the left navigation menu.
Select Search notifications on the right-hand side of your screen.
You will be presented with your notifications, laid out in a grid:
To filter this list you can click on the Change filters button.
A wizard will then be presented with the following options in order:
When
Restrict the notifications to just those between the two dates provided.
Which states
Only show the states that have been selected.
Which types
Limit the search to just certain analytics triggers.
Which devices
Only show content from selected devices or groups.
You will now see all the notifications in order with the newest first.
If you do not find the notifications you are looking for then you can click Change filters and narrow your choices down further.