Perhaps you should try some spelling variations:
hang doanh » hanh doanh, nhung doanh, van doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, biet lang
dung cong » dung trong
hieu van » hieu va, thien van, lieu va
doanh va » doan va, doanh tai, doanh cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
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 ((((chieu sang) or (hieu lang))) or (hieu van)) - hang doanh va dung cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu sang) OR (hieu lang))) OR (hieu van)) - hang doanh va dung cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu sang) or (hieu lang))) or (hieu van)) - hang doanh va dung cong dan than cao*.