Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
lanh ban » lanh bang, lang ban, doanh ban
cua tong » cua dong, cua nong, cua song
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - lanh ban ((cua tong) or (cua cong)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - lanh ban ((cua tong) OR (cua cong)) cong tac than cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - lanh ban ((cua tong) or (cua cong)) cong tac than cau*.