This is the 620th most frequent Vietnamese word.
campuchia
"Campuchia" is the Vietnamese name for Cambodia, a country in Southeast Asia.
Here, 'Campuchia' is used as the name of the country.
Campuchia là một quốc gia có nền văn hóa đặc sắc.
Cambodia is a country with a unique culture.
In this sentence, 'Campuchia' denotes a specific subject of interest, the history of the country.
Tôi vừa đọc một cuốn sách về lịch sử của Campuchia.
I just read a book about the history of Cambodia.
This highlights 'Campuchia' as a geographical destination.