Try to attend social gatherings where there are girls that you'd want to be friends with. Be on the lookout for popular events going on in your city or town, and be ready to go to her. If you can, try taking a course that interests you like a community art class, or join an intramural sports club. Meeting new people is easy, you just need to put yourself in a situation that allows you to be around them.  If there is a limited opportunity to be social, try to get creative. You can meet girls at the grocery store, your place of worship, the gym, or at a shopping mall. If you are in school you have the perfect opportunity to meet new girls from your class. Go up to her before or after the class starts. Tell the girl your name, and ask her what her name is. Start small-talk by talking about what you are both doing, or where you both are at the time.  If you are anxious about approaching new people, the only way to feel less nervous is to just do it. The worst thing that can happen is that she might not want to talk to you. Good questions include, “this place is really fun, do you like it?” or “that lecture was really boring, what do you think of the class?” Try coming off as confident but not pushy. Just talk to the girl as if you were talking to a good male friend, but more polite. There's a good chance that the girl you want to be friends with shares something in common with you, because you are both at the same social gathering. For instance, if you are meeting girls at a sports club, you'll most likely share an interest in sports or if you're at an art class an interest in art, etc. Try to find a common bond, and something you are knowledgeable about and that you like to talk about.  Try to be funny and lighthearted when you are talking to a girl. If you can make her laugh, it'll be more likely she will want to be your friend.  Be a good listener and let her talk. The more you ask questions, the more she will open up and feel comfortable. You should be responding and stating your opinion, but you should also...

TL;DR in Vietnamese:
Tham gia các sự kiện có các bạn nữ tham dự. Làm quen với bạn nữ mà bạn muốn kết bạn. Tìm và trò chuyện về những điểm chung. Xin thông tin liên lạc. Nhắn tin mời cô ấy đi chơi.