sounds like "và" and not like "vàng"
Interesting that Vnmese ues "both" to describe a plural and singular combined
And it be used when there is more than two subjects:
"Cả anh ấy, cô ấy, bạn và tôi đều thích vàng."
"He, she, you, and I all like gold."
you can't use "all" when it's just two. Just both. Both.
"They and I both like gold" was not accepted.