Most of these shots are from a recent trip to a Sunday market called Mong Hum, located about 3 hours north of Sapa (Northern Vietnam) right up near the Chinese boarder. The ride was spectacular through the mountains on a rough as guts (motorbike only) dirt track. The market was fantastic, so many different hilltribe people gathering to do their weekly trading, bartering and socialising. As usual, all shots taken with permission.
You've got some pretty nice pictures there... I was in Hanoi recently, but did not have time to make it to Sapa. Based on your images, perhaps it's worth considering next time.
Maybe you can add them to my Vietnam gallery when I get time to upload them. I'll keep you posted. I participate in www.shuttermap.com where I can showcase my travels to the world and also sell images (just for fun, and subsidise some travel costs!)