It said Kham had helped raise funds for anti-state activities,joined anti-Vietnam protests in Australia and recruited members for Viet Tan.
Despite sweeping economic reform and increasing openness to social change,Vietnam's ruling Communist Party retains tight media censorship and does not tolerate criticism from both within and outside Vietnam.
The People's Court of Ho Chi Mih City also ordered Kham,a retired baker from New South Wales of Vietnamese origin,to be deported after serving the sentence,lawyer Nguyen Van Mieng said.
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"At the trial,Kham said he loves Vietnam and doesn't have any intention to carry out terrorism activities in the country,"Mieng said."The prosecutors stuck to the idea that he's a member of Viet Tan to charge him with terrorism."
"The jail terms for political prisoners are getting longer and longer,"added Mieng,who is representing a co-defendant of Kham.
Kham entered Vietnam from Cambodia in January this year when he gave $400 to a man named Nguyen Van Vien to fund the operations of Viet Tan,according to the police statement.