Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - ((hanh trung) or (canh tranh)) va thuong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((hanh trung) OR (canh tranh)) va thuong cong san toan ban*.