There are different reasons why you can't find the desired story.
In a first step please check your filter settings. If you still can't find the story although you chose the correct settings it can mean that it is supposed to be published on a platform to which you don't have access to. That means that:
1. you aren't a memeber of the group which has access to that platform or
2. your group doesn't have access to that platform.
In this case please contact one of your admins so she/he can grant you access.
Maybe the story has been deleted? Not all stories get published. Some are rejected or get deleted by mistake. Please note that you only get a message on this matter if you chose the option to get messages on changes in your personal settings.
Maybe the platform on which the story was to be published got deleted somehow? In this case the stories didn't get deleted. They just lost their ancor in Desk-Net so they don't appear anywhere unless they also were assigned to another platform or as an event to another group.
One important reference: You can find all stories with the "search" feature in the upper right corner. You can even find and restore deleted entries up to 14 days after deletion.