Mua Bán Nhanh is a mobile application to buy and sell goods online with a few clicks. In this app, users can easily browse the whole catalog of products that are available. The only requirement is that the seller must have a smartphone and be in the range of the application. This is because the application needs to know the location of the seller in order to make a good offer to him. 

If the seller is not in the range of the application, the user will not be able to buy from him. This is because the app will not be able to know the price and quality of the product. This is the same with the quality of the product, which is important because it is the basis for the offer.

The app has a variety of products. The user can choose to buy an item from the catalog of the app.