Your female cat will chose a place where she feels safe to give birth. By all means, provide a large cardboard box, turn it on its side and line it with warm, dry bedding–but don't be disappointed if she has other ideas. Instinct tells her to find a quiet concealed spot, such as under a bed, behind a sofa, or inside a kitchen cabinet. To learn more about helping your cat give birth, see this article. The first 48 hours is a crucial time for the mother to bond with her kittens, so try not to disturb her. If she gives birth under your bed, leave her there. Moving the newborn kittens will distress the mother and in the worst scenario could cause her to reject them. Once she is firmly bonded, at around four or five days, if you feel it's necessary to move the kittens, do it then. The mother won't want to leave her kittens for long in the first two weeks of their life. Always put food and water within stretching distance of her nest, and if possible, offer a litter tray in the same room so that she can stay within sight and sound of the kittens. If food is in another room, some mothers chose to starve rather than leave their newborn kittens to find it. She needs the extra calories to make milk for her kittens. Feed her kitten food, which has more calories than adult cat food. Instinct helps the mother to keep the nest clean. The newborn kittens do not urinate or defecate on their own, so the mother has to lick their bottoms before and after feeding to stimulate elimination. This way she keeps the nest clean. Try to disturb the nest as little as possible. If the bedding becomes soiled, wait until Mom hops out for a toilet break herself to take out the dirty bedding and pop in clean. If the mother cat is present, the kittens should nurse from her immediately after the last kitten is born. Newborn kittens will spend most of their time sleeping, waking up to nurse every two to three hours. If they do not appear to be nursing, or one kitten is being pushed away from the mother cat by its siblings, supplement with...

TL;DR in Vietnamese:
Chuẩn bị nơi yên tĩnh cho việc sinh nở. Không làm phiền mèo mẹ trong lúc sinh và hai ngày đầu tiên. Để thức ăn, nước, và đất vệ sinh ở trong phòng. Cho mèo mẹ ăn thêm thức ăn. Để cho mèo mẹ thực hiện toàn bộ công việc vệ sinh. Kiểm tra mèo con đã bú sữa hay chưa. Cân nhắc triệt sản cho mèo mẹ. Xem xét tẩy giun cho mèo con.