Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, mot chieu
trang va » tran van, hang va
cong tac » cong ty
tac doan » tap doan, tan doan, thai doan
doan dau » doan dieu, phan dau, doan va

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 - thanh ((trang va) or ((luan or lan) van)) thuong cong tac doan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh ((trang va) OR ((luan OR lan) van)) thuong cong tac doan dau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh ((trang va) or ((luan or lan) van)) thuong cong tac doan dau*.