Kêu gọi sự giúp đỡ. Tỏ ra hào hứng. Giới hạn công việc của người kia. Đề nghị trao đổi. Chuẩn bị tinh thần bị từ chối. Nói lời cảm ơn.

Given the above summary, write a detailed text in English for it.
People aren't mind readers, and unless you tell them you want something, they won't know to ask. People generally want to be helpful, especially if it is a friend or family member.  Ask in person. It is always better to ask the person directly instead of calling over the phone, or sending an email. It is much harder for them to turn you down to your face. Give specific details. When you ask for something, give details about what you want and when you want it. Avoid ambiguous words like "soon"; have specific deadlines instead. A specific request also shows the other person that you put a lot of time into considering what you want, and how they can help. This is something you want, something that excites you. Let the other person know it means something to you. Enthusiasm is contagious, and it will be harder for them to turn you down. If you are excited about the idea, they may become excited as well, and want to help. You don't want to dump an entire project on someone. That only decreases the chances they will be willing to help. Keep your requests simple and straightforward, and don't be afraid to emphasize how little they have to do. Alternatively, rather than asking for the other person's effort, ask for the information that will let you do the task yourself. If your goal is to improve your performance at work, the other person's help might be telling you where to you can learn more about certain programs, rather than demonstrating it for you. If someone is doing something for you, promise something in return. It can be something simple like owing a favor, or paying them back if it involves money.  For friends or peers at work, sometimes it can be as simple as offering to buy lunch, or perform another favor. In a work setting, you can always offer to help with some of their work in return. If you are a kid or teenager asking your parents for something, don't think that you don't have anything to offer them. Your promise can be something like doing chores around the house, or getting better grades....