Perhaps you should try some spelling variations:
cong thuong » hang thuong
thanh toan » thanh hoa, thanh san, tinh toan
doi chieu » doc hieu, doi chi, mot chieu
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan cong » luat cong, luong cong, luan chung
ho chieu » theo chieu, hoc thieu, mot chieu
han toan » van toan, dan toan, khanh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) sach - hanh tang luan cong thuong ((han toan) OR (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - hanh tang luan cong thuong ((han toan) OR (thanh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - hanh tang luan cong thuong ((han toan) OR (thanh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - hanh tang luan cong thuong ((han toan) OR (thanh toan)) cau*.