Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » hoc hien
tranh cua » doanh cua, manh cua
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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: ((toc thieu) OR (hoc thieu)) xanh - hanh tranh cua ((hang cong) OR (dang cong)) van toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc thieu) or (hoc thieu)) xanh - hanh tranh cua ((hang cong) OR (dang cong)) van toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((toc thieu) or (hoc thieu)) xanh - hanh tranh cua ((hang cong) OR (dang cong)) van toan cau*.