Before trying to cultivate a friendship with the girl, question your own motives. Do you really want to be friends with her, or are you just hoping it turns into something more? Even if you still like her, you shouldn't be friends with her just in hopes of getting into a relationship with her. This will probably end up in more rejection if she gets into another relationship or still doesn't want a serious relationship with you. Also, if she realizes you have other motives, she might think twice about being your friend too. Ask yourself, "Do I really want to be friends with a girl who rejected me?" Soon after the rejection, she may feel strange seeing you or talking with you. Show her that you've moved on and you're okay. Don't get tongue-tied or act shy. Talk about school, music, TV, and normal things you would talk with any other friend about. This will help her get more comfortable around you and view you more as a friend than a person she rejected. Do not let her talk you into remaining friends, if you would rather not be her friend. Don't be afraid to reject her friendship and pursue friendships with other girls who may be open to a relationship with you.   It's normal to be nervous about talking to her for the first few times after the rejection. Try reading Talk to a Girl for some ideas on how to overcome your nerves and hold down a conversation. Start a conversation with her about something you know you have in common. For example, you may have a class together. Talking about the teacher or an upcoming test is a good way to get a conversation going. This will break the ice and show her that you're someone she can talk to normally. Again, don't bring up the rejection. This will make her uncomfortable and she probably won't be too excited to talk to you. Any friendship requires mutual interests. When talking to her, try to find out her hobbies and interests. You may find that you like a similar band or sports team. This will give you a ready-made topic to talk about when you see her, and can also give...

How would you rephrase that briefly using Vietnamese?
Tránh những động cơ thầm kín. Liên lạc với nàng một cách tự nhiên. Tìm hiểu những sở thích của nàng. Bắt đầu đi chơi với nàng trong một nhóm. Ngỏ ý đi chơi riêng với nàng một cách từ từ.