Perhaps you should try some spelling variations:
canh doanh » hanh doanh, chinh doanh, doanh doanh
chieu sach » chinh sach, chiet tach, chieu sang
doanh cua » doanh luan
dung cong » dung trong
hieu cac » hieu luc, hieu va, hieu van
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cac) or (chieu sach)) - canh doanh cua dung cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cac) OR (chieu sach)) - canh doanh cua dung cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cac) or (chieu sach)) - canh doanh cua dung cong dan chan cau*.