Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
nhung phuong » dung phuong, nhu phuong, truong phuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trinh toan » tinh toan, thanh toan, trinh han
cua nhung » va nhung
hanh ban » thanh ban, hanh san, hanh han
hang ban » hang luan, hang va, hang tai
toan cau » toan cao, toan ban, toan tap

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 ban) OR (hang ban)) cua nhung phuong trinh toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh ban) or (hang ban)) cua nhung phuong trinh toan cau*.