Vietnam Airlines has released a seat map of its upcoming Boeing 787-9 Dreamliner that it will take deliveries of from mid-2015, click above picture to open a larger version of this image.
Also check out the photo of each cabin (link opens in new window so you can continue reading) Vietnam Airlines Boeing 787-9 Dreamliner Photos
The Aircraft will feature three classes Economy, Premium Economy and Business Class see the above link for pictures and more details on each class.
Economy Class 211 seats in a 3-3-3 seating config
Premium Economy Class 35 seats in a 2-3-2
Business Class with 28 seats in a 1-2-1 layout