Perhaps you should try some spelling variations:
chiet tach » chieu sach
ncanh tinh » nhanh tinh, thanh tinh, hanh tinh
canh tinh » hanh tinh, manh tinh, canh tranh
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
cua dung » cua dang, cua dong, qua dung
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - ((canh tinh) or (ncanh tinh)) cua dung cong ((dan toan) OR (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - ((canh tinh) OR (ncanh tinh)) cua dung cong ((dan toan) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - ((canh tinh) or (ncanh tinh)) cua dung cong ((dan toan) OR (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - ((canh tinh) or (ncanh tinh)) cua dung cong ((dan toan) OR (dan than)) cao*.