First, read the English article below.

If you can see the string, and it’s not also stuck inside your body, lightly tug on the string while squatting close to the ground with your feet and knees spread apart, but not wide enough for you to actually be sitting on the ground.  You want to lightly tug at the string to see if the tampon comes out on its own because this would be easiest. There should generally be at least an inch of string coming out of you if the tampon is properly positioned. Try different positions if it doesn’t come out right away.  Prop your feet with something and sit on the toilet. Or put one foot on the bathtub. However, many times the string is stuck inside a woman’s vagina with the tampon. It may take a minute or two until you can pull it out. If that's the case, move on to the next step. It’s easier to get a stuck tampon out if you do it while sitting, squatting down, or lying down.  You also want to bear down to try to dislodge it. Try changing positions if you can’t find it right away.  Prop your feet on a trashcan or bathtub, or squat over the toilet bowl for sanitary reasons. Bear down as if you’re straining to have a bowel movement or are giving birth or are doing reverse kegels. Sometimes, this can force the tampon out. Bearing down will help ease it into a more easy-to-reach position. Take a deep breath. If you prefer to lie down, lie flat on your bed with your knees bent. Insert one finger in your vagina and feel for the tampon or its string. If you can feel it, start nudging it toward the opening of your vagina. When it gets close enough, grab the tampon with your index finger and thumb. You are going to have to put your finger into your vagina as far as possible. Make circular motions with your finger between the cervix and vagina. This is where most stuck tampons are. You might need to use your index finger and your thumb.   Find the tampon, and insert another finger if you'd only used one at first. Catch the tampon's cotton cylinder between your fingers, and try to pull it out. You will need to pull out the... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Kéo sợi dây. Ngồi, ngồi xổm hoặc nằm. Thở ra và đưa một ngón tay vào âm đạo.