Listening is also related to brain psychology. The brain works out of habit. Familiar sounds will be handled by the brain. Strange sounds will pass. So, listening to a new language needs practice. The more you listen to, will help your brain get used to the sound. At first, trying to listen will make you feel uncomfortable, because your brain refuses to process the strange sound. The more you hear, the more you are telling your brain to adapt and process this sound. So when you hear a lot, your brain will be able to distinguish and respond better to that sound. At first it is almost impossible to tell what they say, but after a while it becomes easy. You gradually recognize many familiar words, gradually you can almost understand what is said without your brain "translated" into Vietnamese. Therefore, practicing hearing is extremely important. It helps you to feel interested in English.