Perhaps you should try some spelling variations:
chiet tach » chieu sach
canh trinh » canh tranh, hanh trinh, canh tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh vat » trinh van, trinh luat, sinh vat
trong tac » trong cac, tuong tac, trong tuc
trong tan » trong quan, trong cac, trong ca
vat dung » van dung, va dung, viet 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: ho ((lieu tinh) OR (chiet tach)) - canh trinh vat dung ((trong tac) OR (trong tan)) phan tu~.
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (chiet tach)) - canh trinh vat dung ((trong tac) or (trong tan)) phan tu*.