You can find them in the laundry department of a supermarket, as well as in fabric stores and pet stores. Peel the wrapper off the tube part, and roll it across the garment. Use and up-and-down motion. As you continue to roll, you will notice that the lint roller is become less tacky. When this happens, simply peel off the sticky sheet to reveal a fresh sticky underneath. Keep rolling and removing sheets until there is no more lint. Cut a piece of wide tape that is a little more than twice the width of your hand. Hold out your hand with your fingers closed together. Wrap the tape, sticky-side-out around your fingers, and overlap the edges. Lightly pat the affected area with your fingers. When the tape stops being sticky, simply rotate the tape around your fingers until the dirty side is facing you. Continue patting the garment with the fresh side of the tape. This is a battery-powered device that you can glide on to your clothes to take care of the lint. Turn on the shaver, and run it gently across the fabric. When you are done, open up the lint compartment, and toss the shaved lint into the trash. This can also remove pilling. Make sure that you are going with the weave of the fabric, and not against it. Also, try not to rub too hard, or go over the same area too much. The pumice stone will take off the top layer of the fabric. If you keep going over the same spot, you may get a hole. Purchase some Velcro and cut a piece that is about the width of your hand. Find the rough side with the hooks and set aside the soft, fuzzy side. Rub the Velcro downward against the garment. If the lint gathers at the bottom of the garment, then pick it off using some tape or a lint roller. Wet a sponge or scouring pad with water, and squeeze it to get rid of the excess moisture. Gently rub the rough side of the sponge or scouring pad against the fabric. Use a downward motion, and work in small sections at a time.

TL;DR in Vietnamese:
Sử dụng cây lăn bụi quần áo. Quấn băng dính bản rộng xung quanh bàn tay. Cân nhắc dùng máy cạo xơ vải. Dùng đá bọt chà lên áo len. Sử dụng băng nhám dính Velcro để lấy xơ vải. Dùng mút ẩm hoặc miếng cọ rửa để đánh sạch xơ vải.