Tăng khẩu phần ăn. Ăn thường xuyên. Tăng bữa ăn nhẹ. Cải thiện hương vị món ăn. Ăn nhanh hơn một chút.

Given the above summary, write a detailed text in English for it.
Try eating just a little bit more with each meal than you normally would, even if you have to push yourself slightly past your comfort zone.  Over time, your stomach will adjust to the bigger portion size and you will no longer notice the difference. One good trick to help you with this is to try serving your food on larger plates - this will trick your brain into thinking that you're eating less than you actually are. Try eating more often than you normally would, and never skip meals. In fact, most experts agree that eating six mini-meals a day is better than eating three large ones.  This can help you with your weight gain as you'll feel less bloated after each meal. Try to get a balance of protein, starch, vegetables and fat with each meal. Try to incorporate more snacks into your daily routine, as these can be a great way of adding calories without having to eat too much. Grab a handful of nuts while you're watching TV, eat a banana on your way to work, or spread some hummus on wholegrain crackers while you're waiting for dinner. People who are underweight often complain that food just doesn't appeal to them.  Therefore, it's a good idea to make your food more appealing by experimenting with herbs and spices and by making new dishes that you've never tried before. You can also improve the flavor of food by adding tasty toppings - like a dollop of full-fat mayonnaise to a turkey sandwich, a sprinkling of cashew nuts over a stir-fry or salad, or a handful of cheese over homemade tacos or spaghetti bolognese. Dieters are often advised to eat more slowly, as this helps their brain to register that they are full before they can overeat. The opposite goes for those who are trying to gain weight.  Eating a little faster than normal can help you to consume more food before you start to feel full, thus increasing your calorie intake. Don't go too fast though, as this can leave you feeling bloated and sick.