At least, this will require a partners award, but with multiple stopovers (Myanmar and Vietnam) this will most likely be most effectively done with a oneworld award. To acquaint yourself with both partner and oneworld awards, please look at the oneworld award sticky thead - it also has links for the all partner award.

Maybe BKK and LCC to Myanmar?

Christmas is a high demand season (regardless of the holiday, it's the season), and you may have to be more creative in routing to find your seats (and it will certainly be easier with one flyer than with two or more).