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