Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
thanh thong » thanh thuong, thanh hong, thanh thang
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cua thong » cua thuong, cua khong, cua tong
cua dong » chua dong, cua cong, cua dang
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh thong ((cua thong) or (cua dong)) phuong trinh ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh thong ((cua thong) OR (cua dong)) phuong trinh ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh thong ((cua thong) or (cua dong)) phuong trinh ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh thong ((cua thong) or (cua dong)) phuong trinh ((toan cau) OR (toan cao))*.