First, read the English article below.

Bypass pruners cut like scissors, making them preferable to anvil-type pruners, which have a tendency to crush the stems as they cut. Nice, clean cuts are essential to maintaining the health of the plant.  If you don’t have a pair of pruners handy, you could also use full-sized hedge clippers or trimmers. Whatever tool you use should be nice and sharp and able to make clean cuts. When you need to cut canes larger than about 1⁄2 inch (1.3 cm) in diameter, switch to a set of larger loppers.  Disinfect pruners with rubbing alcohol or bleach diluted with water to sterilize them. In order to prune your knockout roses safely and effectively, you’ll need to pull on a pair of rugged elbow-length gardening gloves. Your gloves should be thick enough to safeguard your skin from any thorns growing on the bushes. Don’t attempt to prune your knockout roses without some kind of protective covering—a pair of standard wrist-length gardening gloves is better than nothing. While you’re pruning your roses, stop periodically to dip them into a container filled with cleaning solution. Any all-purpose household cleaner will do the trick. Making sure your cutting blades are properly sanitized lowers your chances of accidentally spreading disease from one plant to another.  Get in the habit of disinfecting your pruners regularly, whether you’re trimming a little or a lot. Alternatively, you can use a solution made up of 70% rubbing alcohol diluted in water. Make your cuts roughly 1⁄4 inch (0.64 cm) above an outward facing bud, with the slant pointing away from the bud. This helps promote new growths to grow outward rather than inward. This technique should be used regardless of the time of year or size of the growth you’re pruning.  Angled cuts help water run off the stem and reduces the chance of fungal rot. Cutting too close to the bud could shock it, while cutting too far away might leave too much old growth behind, forcing the plant to direct valuable resources to canes that are no longer able to produce new buds. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Tìm kìm tỉa cây sắc loại mỏ cong. Đeo găng tay để bảo vệ bàn tay và cánh tay. Khử trùng kìm tỉa cây trước khi bắt đầu cắt tỉa. Cắt các cành cây chéo góc 45 độ.