Register for a Hygiene Proficiency Test in Vietnamese! Find a suitable time for taking the Hygiene Proficiency Test from the list below, and move forward by clicking the “sign up” button. Traffic light colours indicate available slots for the test. If you don’t find a suitable test in Vietnamese, you’ll find the tests in other languages here. You can also contact us and tell us in which language, where and when you would like to do the Hygiene Proficiency Test in.