Perhaps you should try some spelling variations:
khai thuong » khac thuong, khai chuong, khau thuong
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
hai thuong » hoai thuong, han thuong, tai thuong
doi chieu » doc hieu, doi chi, ho chieu
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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 - thanh trung ((hai thuong) OR (khai thuong)) cong san than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh trung ((hai thuong) OR (khai thuong)) cong san than cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung ((hai thuong) OR (khai thuong)) cong san than cau*.