Perhaps you should try some spelling variations:
cuc doanh » cac doanh, cua doanh, cho doanh
muc doanh » cac doanh, cua doanh, mot doanh
thu sinh » thu minh, thu kinh, thuoc sinh
cuu dong » cuu cong, cuu tong, cuu long
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sinh hoc tap, nghien cuu dong ((cuc doanh) OR (muc doanh)) hoa hoc xa hoi dan nhan va~".
• Adding a wildcard symbol may retrieve word variants: thu sinh hoc tap, nghien cuu dong ((cuc doanh) OR (muc doanh)) hoa hoc xa hoi dan nhan va*.