Perhaps you should try some spelling variations:
mot trieu » mot chieu, mot tri, mon triet
hanh tang » hanh trang, anh tang, hanh mang
tang chua » tang cua, tranh chua, tang ha
chua nang » chuc nang, chua xang, kha nang
nang hang » nang sang, hang hang, cang thang
25 trieu » 30 trieu
va tuan » van tuan, va quan, a tuan
va toan » van toan, bai toan, tap toan

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: ((25 trieu) OR (mot trieu)) tinh - hanh tang chua nang hang ((va tuan) OR (va toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: ((25 trieu) or (mot trieu)) tinh - hanh tang chua nang hang ((va tuan) or (va toan)) cau*.