Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
chieu sang » chieu sach, chieu xanh, hieu lang
trinh toan » tinh toan, thanh toan, trinh han
tieu sang » tieu dung, tiem nang, tinh sang
hanh nang » anh nang, ganh nang, hanh mang
cao cong » cac cong, cua cong, cao tang
toan cau » 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 ((tieu sang) OR (chieu sang)) - hanh nang ((cao cong) or (cao dang)) phuong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sang) OR (chieu sang)) - hanh nang ((cao cong) OR (cao dang)) phuong trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sang) OR (chieu sang)) - hanh nang ((cao cong) or (cao dang)) phuong trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sang) OR (chieu sang)) - hanh nang ((cao cong) or (cao dang)) phuong trinh toan cau*.