I have a way to learn Vietnamese.
I learn this new language by Vietnamese songs. Vietnamese songs are so nice! I have some suggestions.
Tâm sự với người lạ (http://mp3.zing.vn/bai-hat/Tam-Su-Voi-Nguoi-La-Tien-Cookie/ZW7O6UDW.html)
I'm not sure about "now" but I tried in the past in some European and American countries and it said it didn't support in my country yet :/.
Here in the U.S. I can use it on a computer fine, though it does not work on mobile for that reason. On a mobile device I can also access it through the browser.