Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
anh dang » anh dong, anh dung, anh bang
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

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 - ((canh tranh) or (anh dang)) luan dang cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((canh tranh) OR (anh dang)) luan dang cong tac than cap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((canh tranh) or (anh dang)) luan dang cong tac than cap*.