thiên thần 天神
Mandarin tiānshén; Cantonese tin1san4
What about thiên sứ?
For K-pop fans, compare to Korean 천사 or Japanese 天使. Thiên sứ shares the same root.
both are translated as angel. thiên thần literally means deity from the heavens, whereas thiên sứ has this little nuance being a envoy or messenger from the heavens.