Before you go out, stand in front of the mirror and take a wide stance with your hands on your hips. Think Superman or Wonder Woman. Studies show that assuming what's known as a "power stance" can improve your confidence. These changes in posture can give you a mental "boost."  Try the "victory" pose. Put your arms in a "V" over your head.  Stretch out in your seat or cross your legs and put your hands behind your head.  Hold these poses for about 2 minutes before going out to the bars (or doing anything stressful). This isn't to say that you can only attract a guy if you look good. Rather, this is about making yourself feel good. If you feel good, you'll have more confidence. Try dressing in clothes that you want to see yourself in. If you've always wanted to wear a suit, go out in a suit. The point is to wear something you associate with power and confidence. You're not trying to impress every guy at the bar, you're trying to find the guy that impresses you. Focus your attention on looking for the guys you want to approach. Gaining confidence will take time; don't expect it to happen overnight. But, the more you stick with it, the more likely it is that you'll become a confident person. Feeling confident is only part of the battle. You have to act with confidence as well. It's a common opinion that people find confidence attractive.

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Write a summary of the previous text in Vietnamese:
Gây ấn tượng với tư thế cơ thể. Chú ý đến hình ảnh bản thân. Gỡ bỏ áp lực cho bản thân. Tập thể hiện sự tự tin.