Perhaps you should try some spelling variations:
dung cong » dung trong
hieu lang » chieu sang, hieu quang, nhieu tang
hoi hieu » hoi phieu, hoi tieu, moi hieu
anh nang » ganh nang, anh bang, anh dang
nang doc » nang luc
doc dung » duoc dung, hoc dung, duc dung
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - anh nang doc dung cong ((dan than) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - anh nang doc dung cong ((dan than) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - anh nang doc dung cong ((dan than) or (dan chan)) cau*.