The Vietnamese word "ai ai" translates to "everyone" or "everybody" in English. It is used to refer to all people in a general sense, indicating inclusivity or universality.
Ai ai đều cũng phải chết.
Translation: Everyone is mortal.
This sentence communicates the universal truth that all people eventually face death.
Ai ai cũng khao khát yêu và được yêu.
Translation: Everyone aspires to love and to be loved.
Here, it highlights a common human desire shared by all.
Ai ai cũng vui trừ anh ta ra.
Translation: Everybody is happy but him.
This sentence points out that while the majority are happy, there is one person who is not.