Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » hanh chinh
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
van nhung » van nhuong, va nhung, van hung
ban thanh » ban hanh, ban hang
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - ((hanh trinh) OR (canh tranh)) van nhung cong ((dan toan) or (ban thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hanh trinh) OR (canh tranh)) van nhung cong ((dan toan) OR (ban thanh)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((hanh trinh) OR (canh tranh)) van nhung cong ((dan toan) or (ban thanh)) cau*".