Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hien xanh » chieu xanh, hien khanh, khien canh
hien hanh » dieu hanh
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong ban » cong bang, cong san, cong tan
ban tran » ban trang, tan tran, ban than
tran cau » tran chau, toan cau, ran 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) OR (hien nhanh))) or (hien hanh)) - canh tranh cua dung cong ban tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hien xanh) OR (hien nhanh))) OR (hien hanh)) - canh tranh cua dung cong ban tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hien xanh) OR (hien nhanh))) or (hien hanh)) - canh tranh cua dung cong ban tran cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((((hien xanh) OR (hien nhanh))) or (hien hanh)) - canh tranh cua dung cong ban tran cau*.