First, read the English article below.

The citric acid in lemon juice is a natural bleaching agent which could possibly be used help to lighten the skin, if used carefully. It's critically important to avoid going out in the sun with citrus juice on your skin, however, which can cause a painful reaction called "phytophotodermatitis."<  Squeeze the juice from half a lemon and dilute it to half strength with water. Dip a cotton ball in the liquid and apply the lemon juice to your face, or wherever you wish to lighten the skin. Leave the lemon juice to sit on the skin for 15 to 20 minutes. Do not go outside during this time, as the juice makes your skin hyper-sensitive to sunlight. Thoroughly rinse your skin when you're done, then apply a good moisturizer as lemon juice can be very drying. Repeat this treatment 2 to 3 times a week (no more) for best results. Turmeric is an Indian spice which has been used in skin lightening treatments for thousands of years. While the effects haven't been studied, turmeric is believed to inhibit melanin production, thereby preventing the skin from becoming tanned.  Mix turmeric with some olive oil and chickpea flour to form a paste. Apply the paste to the skin using gentle circular motions. This will help to exfoliate the skin. Leave the turmeric paste to sit on the skin for 15 to 20 minutes before rinsing off. The Turmeric may stain your skin slightly yellow, but this should quickly wear off. Repeat this treatment once or twice a week for best results. You can also use turmeric in your Indian cooking!  You can also cook with turmeric or use it to make teas and smoothies. It is very beneficial to your skin when it's ingested. Raw potato is believed to have mild bleaching properties, due to its high vitamin C content. Vitamin C is used as a lightening ingredient in many OTC skin creams. To use:  Simply cut a raw potato in half, then rub the exposed flesh over the skin you wish to lighten. Leave the potato juice to sit on the skin for 15 to 20 minutes before rinsing. You will need to repeat this treatment several times... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Nước cốt chanh. Thử dùng nghệ. Khoai tây sống. Cây nha đam. Nước dừa. Đu đủ. Cân nhắc đến việc sử dụng hydroquinone.