Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
cua nhung » va nhung
van thanh » van tuan
ban thanh » ban hanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (hieu lang)) - canh tranh cua nhung duong ((van thanh) OR (ban thanh)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - canh tranh cua nhung duong ((van thanh) OR (ban thanh)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - canh tranh cua nhung duong ((van thanh) OR (ban thanh)) tap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - canh tranh cua nhung duong ((van thanh) OR (ban thanh)) tap*.