Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
doanh khoa » toan khoa
soc doanh » so doanh, hoa doanh, voi doanh
thanh van » thanh san, thanh toan, thanh phan
thu canh » thuc hanh, thu cong, thu ban
canh hoc » anh hoc, cach hoc, danh hoc
cac cong » cua cong
cong soc » cong so, cong suc, cong coc
khoa hoc » hoa hoc
thai van » thai vung, thai den, thai son
thi van » thi lan, thi hanh, thi nang
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: thu canh hoc tap, nghien cac cong soc doanh khoa hoc xa ((thai van) OR (thi van)) thanh van~.
• Adding a wildcard symbol may retrieve word variants: thu canh hoc tap, nghien cac cong soc doanh khoa hoc xa ((thai van) or (thi van)) thanh van*.