Overseas participants entering Vietnam should possess a passport with valid visa which can be obtained at the Vietnamese Embassies or Consulates in the corresponding countries. Visas are exempted for the citizens of the countries, which have signed a bilateral visa exemption agreement with Vietnam, including Thailand, Philippines, Malaysia, Indonesia, Singapore, and Laos. Vietnam also made a unilateral decision on visa exemption for citizens of Japan, South Korea, France, Italy, Germany, United Kingdom, Sweden, Norway, Denmark, Russia and Finland for short visits within 15 days. Please click here for information in detail. 

Please refer to this link for Vietnam visa information and application.