I know I'm about a year late, but next time you come back and you feel like Vietnamese, you could try this site: www.pho411.ca it's an online guide to vietnamese cuisine as well as a restaurant directory.
you know what? that was a lie. we had thit kho for new years, not hot pot. and new years didn't fall on a weekend either, it was a weekday. And i did think about banh canh, but that was after i left my parents house...i'm so ashamed
i'm visiting my parents for vietnamese new year, so i'll remember to ask my mom for the name of the dish. on that thought...why don't you ask your mom? haha