Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, theo chu, thi chieu
trung cap » truong cao, trung tam
dung cong » dung trong
ho chieu » hoc thieu, doi chieu, mot chieu
cap dung » ap dung, cao dung, chan dung
tan toan » tap toan, van toan, dan 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: ((ho chieu) OR (theo chieu)) tinh - thanh trung cap dung cong ((tan toan) OR (tan tran)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) tinh - thanh trung cap dung cong ((tan toan) OR (tan tran)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) tinh - thanh trung cap dung cong ((tan toan) OR (tan tran)) cau*.