Perhaps you should try some spelling variations:
truong cao » truong dai
trung cap » trung tam
trong san » trong cac, cong san, dong san
ho trieu » mot trieu, 30 trieu, ho chieu
25 trieu » 30 trieu
san toan » van toan, dan toan, manh toan
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: ((ho trieu) OR (25 trieu)) tinh - hanh ((trung cap) OR (truong cao)) dung trong san toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho trieu) OR (25 trieu)) tinh - hanh ((trung cap) or (truong cao)) dung trong san toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) OR (25 trieu)) tinh - hanh ((trung cap) or (truong cao)) dung trong san toan cao*.