Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
thanh tung » thanh cong
manh hung » anh huong
ho nhieu » hop nhieu, ho chieu, he nhieu
cua dung » cua dang, cua dong, qua dung
tac hang » bac thang, tac chong, thai hang
tac vang » cac van, tac dung, tac dong

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho nhieu tang - ((thanh tung) OR (manh hung)) cua dung trong ((tac hang) OR (tac vang)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho nhieu tang - ((thanh tung) or (manh hung)) cua dung trong ((tac hang) OR (tac vang)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho nhieu tang - ((thanh tung) or (manh hung)) cua dung trong ((tac hang) OR (tac vang)) cau*.