Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
vang toan » van toan, quang toan, vang trang
dang toan » dang tran, dan toan, dung toan
cua dung » cua dang, cua dong, qua dung

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: theo tieu xanh - ((hanh tang) OR (hanh mang)) cua dung cong ((vang toan) OR (dang toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - ((hanh tang) or (hanh mang)) cua dung cong ((vang toan) OR (dang toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((hanh tang) or (hanh mang)) cua dung cong ((vang toan) OR (dang toan)) cau*.