Perhaps you should try some spelling variations:
nhieu tang » hieu lang, nhiet nang
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
ban tu » van tu

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

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