Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh tung » thanh cong
nhung cong » thong cong, hang cong, nhung don
hieu lang » hieu quang, nhieu tang, hieu van
dung cong » dung trong
ban than » ban thanh, van thanh, ban hang
than cap » khan cap, thanh lap, thanh cac
tung va » trung va, tuong va, dung va

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 tung va ((nhung cong) OR (dung cong)) ban than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh tung va ((nhung cong) OR (dung cong)) ban than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - thanh tung va ((nhung cong) OR (dung cong)) ban than cap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh tung va ((nhung cong) OR (dung cong)) ban than cap*.