Article in English: Once the no contact period is over, reach out to your ex.  You can do this through an email, phone call, letter, or text message.  If you write an email or letter, tell your ex that you have accepted the breakup, apologize for anything that you did wrong, and tell her something interesting about your life since the breakup.  If you send a text message, try to say something that starts a conversation, is flirty in nature, and does not bring up anything negative. Try texting, "Hey, I was watching X on TV and I it made me think of you :)" You could also text them about a good memory that you guys made together.  For example, "Remember when we went to that great restaurant.." Your initial contact should not mention getting back together or that you miss her or you love her. You have had time to evaluate your relationship.  Now is the time to admit to your mistakes and tell her that you are sorry.  This shows her that you have matured and put a lot of thought into what happened between the two of you. She will also begin to see how you have taken steps to become a better man. This can be done in person or on the phone.  It is better not to have long or emotional conversations through text messaging. Now that you and your ex have been communicating, ask her if she would like to go on a date or hang out.  Try to be very casual and polite when you ask her.  Do not make this out to be a big deal.  Try saying, "Hey, do you want to go get coffee or something?" or "Let's get together to catch up." You can also use the phrase "hang out" instead of "date."  If she is reluctant, you might say, "It's only coffee. What would it hurt?" If she does not want to meet up with you, do not push the issue.  Give her space.  Tell her, "I respect that you don't want to meet up, let me know if you change your mind. It would be great to see you." To win her back, you must do all of the things that you did to make her interested in you the first time. If you used to send her flowers or write her sweet notes, begin to do those things...

Summary in Vietnamese:
Liên lạc với người yêu cũ. Thừa nhận sai lầm của bạn và xin lỗi. Hẹn gặp cô ấy. Tán tỉnh cô ấy thêm một lần nữa. Tránh nói về quá khứ. Bắt đầu một cách từ tốn. Biết khi nào nên từ bỏ.