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 » van toan, dan than, manh toan
toan ban » van ban

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 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 ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - hanh tranh cua ((han tuong) or (nhan tuong)) dan toan ban*.