Perhaps you should try some spelling variations:
doanh trong » doanh tong, doanh thuong, dinh trong
hoa doanh » toan doanh, hoa dan
trong hoc » truong hoc, tuong hoc, thong hoc
toc sach » hoc sach, doc sach, thuoc sach
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan tao » nhan tai, nhan dan
tu sach » thu sach, su sach, te sach
va nhan » van nhan, ca nhan, va phan
hoc xa » hoc ma

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: ((tu sach) OR (toc sach)) hoc tap, nghien cuu cong hoa doanh trong hoc xa hoi va nhan tao~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) hoc tap, nghien cuu cong hoa doanh trong hoc xa hoi va nhan tao*.