Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hieu lang » chieu sang, hieu quang, nhieu tang
dang cong » dung cong
hoan cua » hoa cua, toan cua, han cua
cua dang » cua cong, cua ban
cong dan » cong san, cong tan, huong dan
dan thi » dang thi, tran thi, dinh thi
thi cao » thai cao, thi hao, thi bao

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) or (chieu sach)) - doanh hoan cua dang cong dan thi cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sach)) - doanh hoan cua dang cong dan thi cao.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu sach)) - doanh hoan cua dang cong dan thi cao*.