Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
manh toan » thanh toan, anh tuan, tinh toan
mang cua » manh cua, dung cua, ban cua
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 - hanh ((trung cua) OR (mang cua)) nhung phuong ((dan toan) OR (manh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((trung cua) or (mang cua)) nhung phuong ((dan toan) OR (manh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trung cua) or (mang cua)) nhung phuong ((dan toan) OR (manh toan)) cau*.