There’s some casual work available in Western-owned bars and restaurants throughout the country. This is of the cash-in-hand variety; that is, working without paperwork. Dive schools and adventure-sports specialists will always need instructors, but for most travellers the main work opportunities are teaching a foreign language.
Looking for employment is a matter of asking around – jobs are rarely advertised.
English is by far the most popular foreign language with Vietnamese students. There's some demand for Mandarin, French and Russian, too.
Private language centres (US$10 to US$18 per hour) and home tutoring (US$15 to US$25 per hour) are your best bet for teaching work. You'll get paid more in HCMC or Hanoi than in the provinces.
Government-run universities in Vietnam also hire some foreign teachers.