Perhaps you should try some spelling variations:
danh nhan » doanh nhan, thanh nhan, benh nhan
cach hoi » cach thoi, cach noi, cach hoc
khoa hoc » hoa hoc
hoi danh » hop danh, hoi dan, hoc danh
nhan dan » phan dau, gian dan, nhan tai
su cach » su sach, tu cach, su cac
mo hoc » mon hoc
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach hoi dap, nghien cuu ((mo hoc) or (co hoc)) toan khoa hoc xa hoi danh nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach hoi dap, nghien cuu ((mo hoc) OR (co hoc)) toan khoa hoc xa hoi danh nhan dan.
• Adding a wildcard symbol may retrieve word variants: su cach hoi dap, nghien cuu ((mo hoc) or (co hoc)) toan khoa hoc xa hoi danh nhan dan*.