Everyone does need a coach, even if it may not change anything during the games, but the player will need someone to talk to to release the nerve and someone can help to read the game from different angle. He only has coach for US Open and WC. For those events, Viet Nam team sends more than one player so will have coach to accompany them. The fund for badminton is not great in Viet Nam, for Nguyen TM, he has great family support to continue with his dream as professional badminton player, not so much from the association. I don't know about the sponsorship, but he has to find multiple sources in order to fund his trip to tournaments around the world.