For Vietnam, the 3 month Multiple Entry visa allows for multiple entries within the allotted time of 90 days. My question concerns the maximum Length of Stay permitted when using this visa.
How long could a person with a US passport stay in Vietnam with a 3 month Multiple Entry visa? Could I do like in Thailand and exit a few days before the 90th day, return on the 89th day and stay an additional 90 days?
I haven't found any discussion about this particular point. Any help will be appreciated.

