Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
trung vat » trung va, trung van, trong vat
ho chiet » ho chieu, ho thiet, hoc thiet
vat dung » van dung, va dung, viet dung
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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 chiet tach - thanh trung vat dung trong ((dan than) OR (dan chan)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh trung vat dung trong ((dan than) or (dan chan)) cau*.