Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
cong phuong » cong thuong, cong huong, dong phuong
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
thanh hang » thanh hoang, thanh thang, tranh hang
trinh toan » tinh toan, thanh toan, trinh han
hanh hang » hang hang, hanh han, hanh mang
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 ((chieu sang) or (chieu xanh)) - ((hanh hang) OR (thanh hang)) tai cong phuong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu xanh)) - ((hanh hang) OR (thanh hang)) tai cong phuong trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (chieu xanh)) - ((hanh hang) OR (thanh hang)) tai cong phuong trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chieu xanh)) - ((hanh hang) OR (thanh hang)) tai cong phuong trinh toan cau*.