Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thien quan » trien quang, lien quan, thien van
thanh dung » thanh duong, thanh tung, thanh hung
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
cong vang » cong lang, cong quang, cong ngang
dang bang » dang dang, tang bang, dang quang
dong bang » dong san
dung cua » dung luan, dung cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) or (thien quan)) - thanh dung cua nhung cong vang ((dang bang) OR (dong bang))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thien quan)) - thanh dung cua nhung cong vang ((dang bang) OR (dong bang)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thien quan)) - thanh dung cua nhung cong vang ((dang bang) OR (dong bang))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thien quan)) - thanh dung cua nhung cong vang ((dang bang) OR (dong bang))*.