Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
tranh luan » trinh luan, trinh luat, doanh luan
luan hoan » luan van
hoan cong » hoang cong, hoa cong, toan cong
cong danh » cuong danh, cong dan, cong thanh
danh nhan » doanh nhan, thanh nhan, benh nhan
nhan cau » nhanh cau, phan cau, nhan sau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chiet tach)) - canh tranh luan hoan cong danh nhan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chiet tach)) - canh tranh luan hoan cong danh nhan cau*.