Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
nang hang » nang sang, hang hang, cang thang
dung cong » dung trong
hang cua » mang cua, hang ca, huong cua
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chinh sach) or (((chieu sang) OR (hieu lang)))) - nang hang cua dung cong san than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chinh sach) OR (((chieu sang) OR (hieu lang)))) - nang hang cua dung cong san than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chinh sach) or (((chieu sang) OR (hieu lang)))) - nang hang cua dung cong san than cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chinh sach) or (((chieu sang) OR (hieu lang)))) - nang hang cua dung cong san than cao*.