Why are you styling your hair? Are you going to prom? Meeting your girlfriend's parents? Just want cool hair? Make the look match the situation.  Keep in mind that formal events call for more traditional hairstyles. Your cousin may not want you to wear a high Mohawk to her wedding. It may be best to choose a style that is close to your everyday style for an important event; this will help you feel more comfortable during the event. If you started using cheap products for your daily style, you may want to consider springing for better quality products for your special occasion.  Cheap products are more likely to cause build-up or undesired effects such as making your hair look either too dry or too oily. Be sure to use the products a couple of times before the special occasion so that you know how your hair reacts to the product. The most important aspect of your special-event hairstyle is that it should look like you spent time trying to make your hair look perfect.  Your part should be made with a comb so that it looks sharp. You should use product to keep the hair where you intend for it to be. A quality hair product that adds a bit of shine or a wet look often works for events.

TL;DR in Vietnamese:
Suy nghĩ đến nhu cầu tạo kiểu và hoàn cảnh hiện tại. Sử dụng sản phẩm chất lượng. Biến mình thành một chàng trai bảnh bao và gọn gàng.