First, read the English article below.

When you're at the flower shop, you might be tempted to buy the tulips with fully-opened, vibrantly colored petals. This would be a fine choice if your tulips were meant to "wow" for a one-night occasion, but if you want them to last a long time, choose tulips that are still tightly closed, with some green buds that aren't fully colored yet. The flowers will open over the course of a few days, giving you more time to enjoy them. If you're  cutting your own tulips and you want them to last as long as possible in a vase, cut them before they're fully opened. Cut as close as possible to the ground. When you bring the tulips home from the shop, keep them wrapped in paper towels or a washcloth soaked in fresh water. This will ensure that the tulips don't start prematurely drying out on the way home. Do this even if the distance from the flower shop to your house isn't very far. Any time out of water will cause the tulips to age faster. Use a small pair of clippers and cut the stems at an angle. This will help them readily soak up water from the vase. If the stems have any leaves that would be submerged in water when you put them in the vase, remove them. The leaves could start rotting and cause the flowers to go limp before their time. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Chọn hoa mới nở. Bọc cuống hoa trong vải ướt hoặc khăn giấy ướt. Cắt bớt khoảng 0,5 cm phần gốc cuống hoa. Bỏ bớt lá ở gốc cuống hoa.