Hi Chatchai, 

Welcome to Box Community and glad to help!

To locate your folders, please check your trash/bin icon in box.com. 

You can start with the search function in your trash to find the missing folders. 

1. Navigate to your Trash folder.


2. Toward the top, click the Search Files and Folders
   


3. In the box that displays, enter any search parameters.


4. Check Only search inside of “Trash.”


5. Press Enter.

Once you've located the folder. Here's how to restore your deleted folder. 

The steps below apply whether you’re selecting from search results or from all Trash items.

1. Hover to highlight the row of the item you want. The More Options ellipsis (…) displays.


2. Click the ellipsis (...).  Then: 

• To return the item to its original location in Box, click Restore.

3. At the prompt, click Okay.

Find out more by going to this helpful article. 

Hope it helps!