The Vietnam Automobile Manufacturers Association (VAMA), which provided the data - excluding TC Motor and VinFast sales - said however sales were down 18.4% year-on-year.
The auto market has been going through a rough year amid low economic growth, with sales plummeting by 30% year-on-year in the first seven months to 162,000 units.
Thaco led with over 8,400 vehicles sold, down only 3.3%.
Toyota sold 3,800 cars, a 31% decline.
Ford bucked the trend, doubling sales to 3,150 units.
Mitsubishi and Honda rounded off the top five.