khách hàng

Etymology
From 🇰🇲. khách by itself usually implies that the person physically goes to a shop or store, but khách hàng has a broader connotation, as in a client who uses any service that doesn't necessarily require them to physically go anywhere, such as Internet service, telephone service, or work on commission. Incidentally, the in this word and the  in  both derive from 🇨🇬, making the Nom spelling of this and the Sino-Vietnamese spelling of  accidental anagrams.

Noun

 * 1) a customer or client