A Ho Chi Minh City court sentenced two people to a combined 10 years imprisonment for subversion on Tuesday .
Tran Vu Anh Binh, 38, and Vo Minh Tri (known as Viet Khang), 34, received six and four years, respectively, on charges of "distributing anti-state propaganda."
They will also be put under house arrest for two years after serving their jail terms.
According to the indictment, in April 2011, Vu Truc, a Vietnamese American, set up an opposition group called "Tuoi tre yeu nuoc" (Patriotic Youth) and a website at "tuoitreyeunuoc.com" to post articles containing distorted information about the policies of the Communist Party of Vietnam.
Binh is among the most active users of the website, the indictment said, adding he posted composed, collected and posted anti-state songs onto the site.
Binh also distributed political leaflets in HCMC, Thai Nguyen, Long An and Dong Thap provinces.
The indictment said Tri wrote two anti-state songs for the website and connived with three members of "Tuoi tre yeu nuoc" to "boost the group's activities."
Police said they found 14 songs and four documents containing anti-state propaganda on Binh's computer and three subversive songs on Tri's computer.