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
tvan cau » toan cau, toan cao, va cau
van cau » van dau, van hau, van chat

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