Perhaps you should try some spelling variations:
luan phuong » quang phuong, doan phuong, luat thuong
chieu sach » chinh sach, chiet tach, chieu sang
thanh tang » thanh thang, thanh trang, thanh tung
lan phuong » van phuong, dan phuong, lan thuong
cong luan » tong luan, cong tuan, dong luan
bo sach » co sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((bo sach) or (chieu sach)) - thanh tang ((luan phuong) OR (lan phuong)) cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((bo sach) OR (chieu sach)) - thanh tang ((luan phuong) OR (lan phuong)) cong luan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((bo sach) or (chieu sach)) - thanh tang ((luan phuong) OR (lan phuong)) cong luan van ban".
• Adding a wildcard symbol may retrieve word variants: doi ((bo sach) or (chieu sach)) - thanh tang ((luan phuong) OR (lan phuong)) cong luan van ban*.