First, read the English article below.

Take out the oven racks so that you can easily reach the bottom. Also be sure to remove any other items you may keep in your oven, such as an oven thermometer or pizza stone.  If your oven racks are also coated in burnt food remnants, you can use these same cleaning solutions to scour them. Simply remove them, clean the oven racks, and replace them once you’re done cleaning the oven. You can easily clean oven racks by soaking them in warm water with dish detergent mixed into it. After the oven racks soak for a few hours, use a scouring pad to remove any stuck on grime. Then dry them with a clean dish towel. It’s best to remove easy-to-clean spills before working on the burnt areas. Use an old rag or some paper towels to clean up any food that’s easily removed from the bottom of your oven. Some of the liquid cleaning agent could drip out of your oven while you’re cleaning. Having something on the ground to catch these drippings helps protect your kitchen floor and makes clean-up easier. This process causes your oven to heat up to a high temperature and bake any food remnants or spills to a crisp. This may help you more easily remove the grime. Depending on your oven, a self-cleaning cycle can take between 1.5 and 3 hours.  If the bottom of your oven is completely covered in burned-on food, you may need to skip this step. Excessive amounts of burned food layers can end up smoking a lot, setting off your smoke alarm and releasing chemicals.  Keep an eye on your oven while running the self-cleaning cycle. If you start to see smoke, it’s probably best to shut off the cycle and just clean everything by hand. Once the cycle is done and the oven has cooled, remove the light-colored, charred ash from the bottom of your oven by wiping it down with a damp cloth. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Tháo dỡ mọi thứ bên trong lò nướng. Lau chùi các mảng thức ăn lớn và các vết nước tràn đổ còn mới. Trải khăn tắm cũ hoặc giấy báo trên sàn trước lò nướng. Sử dụng chu trình tự làm sạch của lò nướng, nếu có.