Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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: doi ((hieu lang) OR (chieu tinh)) - ((nhan dan) OR (phan dau)) cua dung cong dan than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu lang) or (chieu tinh)) - ((nhan dan) OR (phan dau)) cua dung cong dan than cao~".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu tinh)) - ((nhan dan) OR (phan dau)) cua dung cong dan than cao*.