What should garry do after he can't find the key in the doll room of the Museum of Horror Art?

At the Museum of Horror Art, if Garry can't find the key to the doll's room, he can try the following steps:

1. Think back to the details in the previous scene, such as whether other characters appeared in the scene or whether anything was missing.

2. Explore other rooms and areas, especially those adjacent to key rooms, to find possible clues or items.

3. Check the tips or strategies in the game to get clues or tips on how to find the key.

4. If you still can't find the key, please reload the previous archive, try to find the key again, or try to solve the problem with other game characters or strategies.

Please note that each scene and task in the game may have different solutions and strategies, depending on the player's choice and game design. So the above suggestions are for reference only.