Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
thanh ung » thanh tung, thanh hung, thanh dung
dung cong » dung trong
cong bang » cuong bang, dong bang, hong bang
bang khan » bang nhan, bang thanh, dang khanh
tac dung » sach dung, xay dung, tin dung
khan cap » khan ap, than cap, khoan cam
ung tac » tuong tac, huong tac, muong tac

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 xanh) or (hieu lang)) - thanh ung tac dung cong bang khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (hieu lang)) - thanh ung tac dung cong bang khan cap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (hieu lang)) - thanh ung tac dung cong bang khan cap*.