Perhaps you should try some spelling variations:
mot trieu » mot chieu, mot tri, mon triet
hanh tang » hanh trang, anh tang, hanh mang
trong van » trong cac
30 trieu » 25 trieu
tang cua » mang cua, hang cua, tang luan
cua bang » chua bang, cua ban, cua dang
song van » hoang van, duong van, dang van
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: ((30 trieu) OR (mot trieu)) tinh - hanh tang cua bang ((song van) OR (trong van)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((30 trieu) or (mot trieu)) tinh - hanh tang cua bang ((song van) OR (trong van)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((30 trieu) or (mot trieu)) tinh - hanh tang cua bang ((song van) OR (trong van)) toan cau*.