/ˈklaɪənt kɛr ˈlɛtər/ – Phrase
Definition: Thư chăm sóc khách hàng.
A more thorough explanation: an initial letter sent to a client of a law firm with details of what work will be carried out, who will be doing it, the fee structure and the complaints procedure of the firm
Example: Please read all of this document carefully, together with the client care letter you will be sent upon instruction.