Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
chuc hach » chuc hanh, thuc hanh, chuc danh
quan hang » quan hoang, quan hanh, qua hang
quan lang » quan hoang, gian lang, quan luan
cong ban » cong bang, cong san, cong tan
ban chan » dan chan, ban than, ban nhan
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chuc hach) or (chieu sach)) - thanh tung ((quan hang) OR (quan lang)) cong ban chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc hach) OR (chieu sach)) - thanh tung ((quan hang) OR (quan lang)) cong ban chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc hach) or (chieu sach)) - thanh tung ((quan hang) OR (quan lang)) cong ban chan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc hach) or (chieu sach)) - thanh tung ((quan hang) OR (quan lang)) cong ban chan cau*.