Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh lan » tranh luan, tranh ban, thanh lan
hung cong » nhung cong, hung cuong, phung cong
cong tran » cong tan, cong tuan, cong toan
lan hung » van hung, luan chung, lan phuong
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu sang)) - hanh tranh lan hung cong tran van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh tranh lan hung cong tran van ban*.