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

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 xanh - ((lanh sang) or (anh son)) cua tong cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - ((lanh sang) OR (anh son)) cua tong cong tac than cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((lanh sang) or (anh son)) cua tong cong tac than cau*.