You can search your stories by simply entering the title on the search bar by following the below mentioned steps:

Step 1:  Tap "Search" from the Tab bar at the bottom of the screen.

Step 2: Search screen will appear. Enter the title of the story in the search bar and tap "Search".

Step 3: List of all the available stories under that title will appear on the search screen. Tap on the story and enjoy reading it.