Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
dong cong » duong cong, dung cong, dang cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh ((trung cua) or (trung cap)) dong cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh ((trung cua) OR (trung cap)) dong cong tan toan cau*.