Perhaps you should try some spelling variations:
chuan tong » chuan long, chuan trang, nhuan trong
hieu lang » chieu sang, hieu quang, nhieu tang
nhan dang » nhan dan, phan dang, tran dang
phan dong » phan cong, phan dang, phan hong
tong cong » trong cong, cong cong, dung cong
doi hieu » doi chieu, doc hieu, doi hien
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, 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: doi hieu lang - ((nhan dang) or (phan dong)) chuan tong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((nhan dang) OR (phan dong)) chuan tong cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - ((nhan dang) or (phan dong)) chuan tong cong dan than cau*.