Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
cong san » cong tac
tran cau » tran chau, toan cau, tra cau
ran cau » van cau, ban cau, can cau

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 - canh tranh cua dong cong san ((tran cau) or (ran cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh tranh cua dong cong san ((tran cau) OR (ran cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh tranh cua dong cong san ((tran cau) or (ran cau))*.