Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quang » thieu quang, hieu quan, hieu qua
thanh dung » thanh duong, thanh tung, thanh hung
hung cong » nhung cong, hung cuong, phung cong
cong thai » cong hai, hong thai, cong thanh
cho hung » cho nhung, cho huong, cho hang
thai dan » thai doan, thai danh, thoai dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) or (hieu quang)) - thanh dung cho hung cong thai dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu quang)) - thanh dung cho hung cong thai dan ca.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (hieu quang)) - thanh dung cho hung cong thai dan ca*.