Perhaps you should try some spelling variations:
dung thuong » dung trong, hang thuong, cong thuong
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, nhieu tang
dung huong » dung phuong, dong huong, dung luong
hieu lang » hieu quang, nhieu tang, hieu van
tuong va » truong va, thuong va, luong va
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

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