Perhaps you should try some spelling variations:
chiet tach » chieu sach
danh trung » dang trung, dinh trung, thanh trung
manh trung » manh tung, thanh trung, manh hung
quang dung » quang trung, ung dung, cuong dung
trong van » trong cac
ho chiet » ho chieu, ho thiet, hoc thiet
van hanh » van thanh, ban hanh, van anh
hanh cau » nhanh cau, hang cau, hanh cac

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 - ((danh trung) or (manh trung)) quang dung trong van hanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - ((danh trung) OR (manh trung)) quang dung trong van hanh cau*.