The Ministry of Education does not plan to sack teachers first time they fail, but will give them till the next academic year to improve. A second fail would earn the sack. One Ho Chi Minh City-based official estimated that to get all primary school teachers up to standard will take until 2020. A main reason, one teacher told the Vietnam News, is that most teachers, especially in rural areas, almost never have a chance to speak and listen in live practice.
The few successful ones must be unusually motivated. A friend of mine, who teaches at a private secondary school, told me that though she'd been taught English from Grade 6, most of what she knew came from her own study. She'd pick up English language newspapers each week and try to listen to the radio or television. She thinks the main problems facing primary school teachers who've already failed the test once might be the time and resources to study and pass. “They'll need the money to pay for intense courses. I don't think the government give much support.”
It's not just the education sector but also sometimes the educated. I once worked as a sub-editor at a local newspaper. My job was to fix the grammar and English of the translators as well as more standard copy-editing. This meant detangling various clauses that had tripped over themselves twice in the same sentence (our grammar differs rather a lot). There was also the odd over-literal translation to figure out. What was a "multiple somersault train"?, I once wondered.  A roller-coaster.

Source: http://www.economist.com/blogs/johnson/2011/09/english-vietnam