The Vietnamese word "bao thầu" refers to the act of taking a building contract or bidding for a construction project. It is commonly used in the context of construction and contracting.
Công ty này đã bao thầu nhiều dự án lớn.
(This company has taken on many large projects.)
Họ đang tìm kiếm một công ty bao thầu để xây dựng tòa nhà mới.
(They are looking for a contractor to build the new building.)
In a more advanced context, "bao thầu" can be used to discuss the competitive bidding process, where multiple contractors submit their proposals to win a contract for a particular project.