Perhaps you should try some spelling variations:
doanh phan » doanh nhan, doan phan, doanh thanh
voi doanh » von doanh, tri doanh, hoa doanh
mach hoc » cach hoc, anh hoc, bac hoc
dich hoc » sinh hoc, hinh hoc, tinh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoc danh » hoc dan, hoc anh, hoc hanh
danh hoa » thanh hoa, khanh hoa, nganh hoa
hoc xa » hoc ma
xa voi » xa hoi, ba voi, da voi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((mach hoc) OR (dich hoc)) tap, nghien cuu cong hoc danh hoa hoc xa voi doanh phan tu~.
• Adding a wildcard symbol may retrieve word variants: thuat ((mach hoc) or (dich hoc)) tap, nghien cuu cong hoc danh hoa hoc xa voi doanh phan tu*.