Roam Like Home allows you to bring your local Yoodo plan overseas. The steps are as follows:
Step 1: Make sure you have an active Yoodo data plan
Step 2: Click 'Add Roaming/IDD' from the dashboard and choose 'Roaming'
Step 3: Choose Vietnam and click Buy during the promo period (when the price is RM0)
For more information, please refer to this video (YouTube)