Perhaps you should try some spelling variations:
doanh khoa » toan khoa
cuc doanh » cac doanh, cua doanh, muc doanh
thu sinh » thu minh, thuoc sinh, phau sinh
thu kinh » thu minh, thuat kinh, nha kinh
cuu dong » cuu cong, cuu tong, cuu long
dong cuc » dong luc, dong cua, tong cuc
khoa hoc » hoa hoc
dan nhan » danh nhan, dan chan, van nhan
hoi dan » hoa dan, hoc dan, hoi dap
nhan va » nhan tai, nhan dan, nhan tao
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 sinh) OR (thu kinh)) hoc tap, nghien cuu dong cuc doanh khoa hoc xa hoi dan nhan va~.
• Adding a wildcard symbol may retrieve word variants: ((thu sinh) or (thu kinh)) hoc tap, nghien cuu dong cuc doanh khoa hoc xa hoi dan nhan va*.