Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh hinh » hanh chinh, hanh tinh, hanh trinh
hanh dinh » thanh dinh, hinh dinh, hanh tinh
cong cong » cong dong, trong cong, dung cong
cong anh » cong danh, dong anh, hong anh
tuan ban » tuan bang, toan ban, luan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chieu sach)) - ((hanh hinh) OR (hanh dinh)) cua cong cong anh tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sach)) - ((hanh hinh) OR (hanh dinh)) cua cong cong anh tuan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chieu sach)) - ((hanh hinh) OR (hanh dinh)) cua cong cong anh tuan ban*".