Perhaps you should try some spelling variations:
nhung vuong » hung vuong, nhung huong, nhung tuong
hien sach » kien sach, thien hach, chieu sach
dien sach » dien anh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (dien sach)) - canh tranh cua nhung vuong ((dan toan) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sach) OR (dien sach)) - canh tranh cua nhung vuong ((dan toan) or (van toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) OR (dien sach)) - canh tranh cua nhung vuong ((dan toan) or (van toan)) cau*.