Pastor Nguyen Cong Chinh faces abuse after he calls for an improvement in prison conditions.
Ta Phong Tan and Ngo Hao are suffering in jail, their relatives say after recent visits.
Each blames the other for instigating a maritime clash that downed a Vietnamese fishing boat.
She dies after setting her self alight in downtown Ho Chi Minh City.
Among those arrested in recent days were dissidents and pro-democracy activists who were brutally beaten by police, activists say.
They say protests are at risk of boiling over if not permitted to vent.
Official media says the unrest could scare Chinese investors into shunning Vietnam.
Vietnamese police didn't halt the burning, looting, and violence soon enough, expatriates say.
Plane ticket prices rise and hundreds cross the border to Cambodia.
Violence spreads to an industrial park in central Vietnam's Ha Tinh province.
Companies from Taiwan, Japan, South Korea, and Singapore are also affected by violence directed at Chinese-owned factories.
Thousands enter industrial parks and vandalize Chinese foreign investment.
Southeast Asian nations voice 'serious concerns' over the escalating South China Sea crisis.
Vietnamese activists call for protests against Beijing over tensions in the South China Sea.
Beijing has 'invested a lot of Chinese prestige' by placing a rig in contested waters, a Vietnam expert says.
The vessels were trying to stop Beijing from setting up an oil rig in disputed waters.
The move is a departure from the early release of three jailed dissidents last month.
Six Vietnamese bloggers express concerns over harsh restrictions on Internet freedom.