You can also improvise with a wooden chopping board, baking sheet, or other flat item to allow the smooth transfer of pizza onto the barbecue plate. If you're using a homemade dough and not a pre-cooked base, try not to allow the dough to rise too much or it will go soft and tear easily. After adding your toppings, close the lid and let your pizza cook. Use your smell and best judgment to gauge the cooking process—if you smell burning, remove the lid. You can also move the pizza to a cooler part of the grill. If your pizza keeps burning even after moving the pizza or removing the barbeque lid, decrease the temperature to around 500 to 550 °F (260 to 288 °C). Gently hold the side of the crust and cut a straight vertical line down your pizza. Afterwards, cut a horizontal line through the first cut to make 4 even slices.  You add another 1 or 2 diagonal cuts if you want smaller pieces, but 4 pieces is the ideal amount for this size of pizza. If there are various people eating with you, ask for several helpers to keep tending the pizza cooking so that you can share the duties and enjoy eating when your own pizza is ready.

TL;DR in Vietnamese:
Đặt miếng bánh pizza lên xẻng làm bánh pizza. Nướng bánh pizza trong 3-5 phút. Cắt bánh pizza làm bốn phần.