the best Vietnamese restaurant in OC is...
 

Is located in Anaheim, about 1.5miles from Disneyland. Pho Republic
Noodles & Grill is their name. This is the only place I found that
serves authentic, authentic Vietnamese food in a clean, elegant
ambience with great service. They have a very extensive menu that are
appreciated by both Vietnamese and Westerners alike. Check out their
review on AOL Digital City. Check out City Search for a discount, or
check out their website www.pho-republic.com