Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
dung cuong » dung cong, dung luong, dang cuong
hieu lang » chieu sang, hieu quang, nhieu tang
thang va » hang va, trang va, thong va
danh van » doanh van, dinh van, anh van
dang van » hoang van, hang va
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (hieu qua)) - thanh thang va dung cuong ((danh van) OR (dang van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu qua)) - thanh thang va dung cuong ((danh van) OR (dang van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (hieu qua)) - thanh thang va dung cuong ((danh van) OR (dang van)) ban".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (hieu qua)) - thanh thang va dung cuong ((danh van) OR (dang van)) ban*.