I don't know if all of Đại Đồng are written as 大同, especially the Xã(社) in Vietnam. (HELP!) ——討論悁𥱬𠸜尼羅𧵑65.49.68.153討論㨂𢵰)𠓨𣅶 08:34 次𠤩 𣈜14𣎃6𢆥2014。

I think we can write all of them as 大同 at first, then check them one by one later. --SaigonSarang (討論) 19:49 次𠤩 𣈜14𣎃6𢆥2014 (ICT)
𢮿吏張「大同」。