Perhaps you should try some spelling variations:
doanh phan » doanh nhan, doan phan, doanh thanh
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
khanh hoa » thanh hoa, hang hoa
hoi doanh » hoa doanh, voi doanh, doi doanh
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong 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: thu ((sach hoc) or (mach hoc)) tap, nghien cuu tong hoc khanh hoa hoc xa hoi doanh phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach hoc) OR (mach hoc)) tap, nghien cuu tong hoc khanh hoa hoc xa hoi doanh phan tu.
• Adding a wildcard symbol may retrieve word variants: thu ((sach hoc) or (mach hoc)) tap, nghien cuu tong hoc khanh hoa hoc xa hoi doanh phan tu*.