Vietnamese in Clear Lake (HOU)
Nasa Fast Food and Pho Huang are your best bets. Nasa Fast Food for price and quaintness. One little friendly guy running the place, so he gets backed up and service slows at peak times. Pho Huang is a little slicker, faster service and with higher prices.
Many Chinese places in the area do Vietnamese on the side, but they don't reach the level of these two places.