Perhaps you should try some spelling variations:
nhan tuong » nhan trong, nhan thong, nhan tong
hanh tranh » canh tranh, hanh trinh, hanh trang
hien sach » dien sach, kien sach, thien hach
tranh cua » doanh cua, manh cua
han tuong » han thuong, han tong, ban tuong
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sach - hanh tranh cua ((han tuong) or (nhan tuong)) ((dan toan) OR (van toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - hanh tranh cua ((han tuong) OR (nhan tuong)) ((dan toan) OR (van toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien sach - hanh tranh cua ((han tuong) or (nhan tuong)) ((dan toan) OR (van toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - hanh tranh cua ((han tuong) or (nhan tuong)) ((dan toan) OR (van toan)) ban*.