Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
dong ban » dong bang, dong san, dong bac
cong san » cong tac
cong tan » cong tac, cong thanh, cong ty
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 dung ((((dong ban) or (cong san))) or (cong tan)) ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh tranh cua dung ((((dong ban) OR (cong san))) OR (cong tan)) ran cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh tranh cua dung ((((dong ban) or (cong san))) or (cong tan)) ran cau*.