The group travel will include several areas - Hanoi, Ho Chi Minh, halong Bay and Siem Reap. Is this considered single or multiple entry for Visa's?

Thanks for your question in our website. We are pleased to answer that you should apply single entry Visa because you travel in Vietnam first. It't so convenient if your tour schedule change. If you have any questions, please feel free to contact us! Have a nice day! Vietnam Visa Team