The two foreign patients, an Indian expert, 38, and a US expert, 58, boarded different planes from their home countries to Vietnam on April 11 and March 28 respectively.
They tested positive during their stay in quarantine facilities, and were subsequently transferred to health centres for medical surveillance and treatment, said the MoH.
The other 14 patients are Vietnamese citizens returning from Russia, Japan and the US on different dates in April.
All the patients were placed in quarantine upon their arrival, thereby posing no risk to the community, said the MoH.
As of 18.00hrs April 14 Vietnam has recorded a total of 2,733 coronavirus patients of whom 2,445 have been discharged from hospital after making a full recovery from the disease.
Currently, nearly 39,000 people who had contact with COVID-19 patients or returned from epidemic hit countries are kept in quarantine facilities for medical surveillance.
The number of deaths caused by COVID-19 and related illnesses remains at 35.