Many suspect the menacing groups are sanctioned by the government to harass critics and rights defenders.
She asks her to intervene with Vietnam's government to win her mother's release from a prison term served for politically sensitive writings.
He had posted writings criticizing official corruption on his two blogs.
Authorities prosecute, detain, and harass activists to silence dissenting voices, the groups say in an open letter.
The call to residents to surrender to police breaks authorities' earlier pledge not to pursue charges against them.
Student activist faces charges of 'propaganda against the state' under Article 88 for his writing criticizing corruption.
Civil Rights Defenders also calls for an end to the persecution of activists under Article 88.
Tran Thi Thuy, sentenced to an eight-year term for petitioning for land rights, is in constant pain from tumors, her brother says.
Pham Doan Trang, author of 'Politics For All,' explains the motivation for writing her new book in an interview with RFA’s Vietnamese Service.