Perhaps you should try some spelling variations:
doanh khoa » toan khoa
thanh toan » thanh hoa, thanh san
coc doanh » cac doanh, hoa doanh, cho doanh
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
su mach » su sach
hoi dan » hoa dan, hoc dan, hoi dap
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 mach hoc tap, nghien cuu cong coc doanh khoa hoc xa hoi dan ((thanh toan) OR (tinh toan))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su mach hoc tap, nghien cuu cong coc doanh khoa hoc xa hoi dan ((thanh toan) OR (tinh toan))".
• Adding a wildcard symbol may retrieve word variants: su mach hoc tap, nghien cuu cong coc doanh khoa hoc xa hoi dan ((thanh toan) OR (tinh toan))*.