Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
ban can » ban dan, ban hang, ban hanh
ban cau » bang cau, van cau, ban dau

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