Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dong thanh » truong thanh
manh tung » manh hung, thanh tung
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh

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 chieu sach - manh tung ((cua thong) OR (cua khong)) ((dong thanh) OR (cong tan)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - manh tung ((cua thong) OR (cua khong)) ((dong thanh) or (cong tan)) van ban~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - manh tung ((cua thong) OR (cua khong)) ((dong thanh) or (cong tan)) van ban*.