Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh phan » thanh phan, anh phan, hanh han
cong cong » cong dong, trong cong, dung cong
cong luan » tong luan, cong tuan, dong luan
phan cua » nhan cua, than cua, phat cua

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 manh) or (chieu sach)) - hanh phan cua cong cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sach)) - hanh phan cua cong cong luan van ban*.