Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, thong thong, phong chong
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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: doi chieu sach - canh tranh cua ((thong cong) OR (tong cong)) ((dan toan) OR (manh toan)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh tranh cua ((thong cong) or (tong cong)) ((dan toan) OR (manh toan)) tap~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh cua ((thong cong) or (tong cong)) ((dan toan) OR (manh toan)) tap*.