Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
tranh cua » doanh cua, manh cua
dung cong » dung trong
vang hanh » dang hanh, nang hanh, tang hanh
cua dung » cua dang, cua dong, qua dung
van hanh » van thanh, ban hanh, van anh

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - canh tranh cua dung cong ((vang hanh) OR (van hanh)) cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu xanh)) - canh tranh cua dung cong ((vang hanh) OR (van hanh)) cap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - canh tranh cua dung cong ((vang hanh) OR (van hanh)) cap*.