To try to get the foreign object dislodged, you need to push your fist and hand into your diaphragm or stomach area. Use a quick j-shaped motion, in and then up. Repeat multiple times.  If this does not dislodge the foreign object very quickly, you need to try to add more force with a stable object. In your immediate area, you need to find a stable object that is about waist high that you can bend over. A chair, a table, or a counter top will work well for this. With your hands still clasped in front of you, bend over the chair, table, counter, or other solid object. Brace your fists between the chair and your abdomen and drive your body against the solid object. This will greatly increase the force you apply to your diaphragm, which will be more effective to help dislodge seriously stuck foreign objects. You may not be able to dislodge the object during the first try. You need to quickly repeat pushing yourself onto the stable object until the object is removed. You should return to normal breathing once it is removed.   Although it is very scary, it is better if you stay calm. Panicking will only increase your heart rate and need for air, which will make it worse. Once you have it dislodged, sit down and catch your breath. If you find that you are uncomfortable or your throat is sore, you may need to see your doctor.  If you cannot get it dislodged, call 911.

How would you rephrase that briefly using Vietnamese?
Ấn bụng và đẩy lên. Tăng lực tác động bằng một vật phù hợp. Lặp lại các bước.