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