Perhaps you should try some spelling variations:
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, cong tan
toan tang » toan thang, toan mang, toan tong
tang cong » tang cuong, trang cong, dang cong
ho trieu » mot trieu, 25 trieu, ho chieu
30 trieu » 25 trieu
san cao » san co, san cho, san bao

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: ((ho trieu) OR (30 trieu)) tinh - ((thanh trung) OR (thanh tung)) toan tang cong thanh san cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho trieu) OR (30 trieu)) tinh - ((thanh trung) or (thanh tung)) toan tang cong thanh san cao~".
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) OR (30 trieu)) tinh - ((thanh trung) or (thanh tung)) toan tang cong thanh san cao*.