Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
cong phuong » cong thuong, cong huong, dong phuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
hanh hang » thanh hang, hang hang, hanh han
hang cua » mang cua, hang ca, huong cua
toan cau » toan cao, toan tap
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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 sang - hanh hang cua cong phuong trinh ((((toan cau) OR (toan tai))) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sang - hanh hang cua cong phuong trinh ((((toan cau) OR (toan tai))) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - hanh hang cua cong phuong trinh ((((toan cau) OR (toan tai))) or (toan ban))*.