Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
trung ap » trung cap, trung lap, trung tam
dan toan » van toan, dan than, xuan toan
van tuan » van quan, van ban, anh tuan
ap dung » xay dung, van dung

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: theo chieu xanh - thanh trung ap dung cong ((dan toan) OR (((manh toan) OR (van tuan)))) cau~.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh trung ap dung cong ((dan toan) or (((manh toan) or (van tuan)))) cau*.