"Châu Đại Dương"
"The term Oceania refers to a group of island countries and territories in the Pacific Ocean, together with the continent of Australia. Pacific islands with ties to other continents (such as Japan, Hawaii or Easter Island) are usually grouped with those continents rather than Oceania. This term is used in several different continental models instead of Australia."
Oceania is a continent where there are Australia, New Zealand, New Guinea, etc.