Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
toan cao » toan ban, toan tap

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: hoc ((hieu nganh) OR (chieu sach)) - hanh trung cua tong cong san ((toan cao) OR (van ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (chieu sach)) - hanh trung cua tong cong san ((toan cao) or (van ban))*.