First, read the English article below.

Iron is an important element in hemoglobin production. If you’re suffering from low hemoglobin count, increase your consumption of iron-rich foods such as:  Seafood like shrimp and clams Lean meats, like chicken and beef Tofu Eggs Green leafy vegetables like spinach Certain fruits like pineapple, apples, and pomegranates Beans and other legumes Nuts like almonds. These should be eaten with precaution to avoid having an allergic reaction. Vitamin C can facilitate iron absorption in the body.  It can be acquired by consuming these fruits and vegetables:  Oranges Mangoes Tangerines Strawberries Cabbage Broccoli Peppers Spinach. Folic acids are vital in red blood cell production. Foods that are rich in folic acids include:  Seeds Peanuts Wheat germ Sprouts Broccoli Nuts If your diet also includes lots of vitamin C, it is advised to eat a little more folic acid since Vitamin C makes the body excrete folic acid. Cereals, pastas and breads made from whole grains are enriched with iron. As we discussed, iron is a main component in the production of hemoglobin (the blood needs it to form the proteins). Eating these foods can up your iron levels, in turn upping your hemoglobin level. Stay away from white breads, cereals, and pastas. These have had their nutrients processed out of them, also resulting in them losing their color. They offer little nutritional benefit and are often full of simple carbohydrates, or sugars. Avoid iron blockers – these are food items that can block the body’s ability to absorb iron. Examples of iron-blocking foods and substances are:  Parsley Coffee Milk Tea Colas Over the counter antacids Fiber and calcium-rich foods Alcohol like wine and beer Gluten is a form of protein that can be obtained from grains. For some individuals with gluten-sensitive enteropathy, the intake of foods containing gluten can damage the lining of the small intestine, which in turn can cause impairment in nutrient absorption including calcium, fat, folate and iron. Nowadays, having a gluten-free diet doesn't have to... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Ăn thực phẩm giàu sắt. Tăng cường bổ sung vitamin C. Ăn thực phẩm giàu axit folic. Ăn ngũ cốc nguyên hạt. Tránh các thực phẩm ngăn chặn hấp thụ sắt. Ăn ít gluten.