Perhaps you should try some spelling variations:
thanh tung » thanh cong
trong san » trong cac, cong san, dong san
doc hieu » toc thieu, hoc thieu
tung dap » tung dan, trung dai, tuong dan
dap dung » ap dung, dan dung, dap ung
san toan » van toan, dan toan, manh toan
toan tap » toan ban
doi chi » doi khi

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: ((doi chi) OR (((doc hieu) OR (hoc hien)))) sang - thanh tung dap dung trong san toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chi) or (((doc hieu) OR (hoc hien)))) sang - thanh tung dap dung trong san toan tap~".
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (((doc hieu) OR (hoc hien)))) sang - thanh tung dap dung trong san toan tap*.