Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh
nhieu tang » nhiet nang
canh trang » canh tranh, hanh trang, banh trang
hieu lang » hieu quang, hieu van, biet lang
dung cong » dung trong
cong dang » cong dong, cong dan, cong dung
trang va » tran van, hang va
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: hoc ((((chieu sang) OR (nhieu tang))) or (hieu lang)) - canh trang va dung cong dang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu sang) OR (nhieu tang))) OR (hieu lang)) - canh trang va dung cong dang van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((chieu sang) OR (nhieu tang))) or (hieu lang)) - canh trang va dung cong dang van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sang) OR (nhieu tang))) or (hieu lang)) - canh trang va dung cong dang van ban*.