Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
phuong van » phung van, phong van, phuong lan
thanh chau » thanh cha, thanh cham, thanh chu
mang luan » tang luan, hang luan, mong luan
bang luan » tang luan, hang luan, dung luan
thanh cau » thanh mau, nhanh cau, thanh ca

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: theo chieu sach - hanh ((mang luan) OR (bang luan)) nhung phuong van ((thanh cau) OR (thanh chau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((mang luan) OR (bang luan)) nhung phuong van ((thanh cau) or (thanh chau))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((mang luan) OR (bang luan)) nhung phuong van ((thanh cau) or (thanh chau))*.