I attended my company orientation in Seoul in 2012 and in Malaysia in 2014 for two weeks. Each time I lost around three kilograms since I was not good at eating foreign foods including fast food. Therefore, the idea of spending a semester doing this exchange program scared me a lot. To cope with that fear, I always told myself to learn to cook before I flew, which never came true. Amazingly, when I arrived in Belgium, I got to realize that I was actually able to eat anything I was recommended or wanted to. However, the only thing which started to frighten me was not the foreign foods' looks or tastes but their prices. Therefore, personally, I strongly recommend you learn to cook from your mom or YouTube videos if you have no clues what cooking is about. Do not worry whether or not you can find the same ingredients and vegetables in Cambodia. There are two family grocery stores owned by a Vietnamese family and a Thai (Go to the Stores) where you will most likely see what you are looking for.
Your first few meals are going to be very challenging since you will be trying to find your foothold on a new country's soil. Consequently, bring some salted or smoked fish, beef, or pork with some rice if you want to persuade yourself to feel at home. However, if you want to have a hot Thai dish to compensate for your long tiring flight, go to Thai Cafe, which is not far from the center of Hasselt (https://goo.gl/maps/LvqmqpNN86NxiuLo9).
