Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoa nganh » hoc nganh, khoi nganh, hoa doanh
dich hoc » sinh hoc, hinh hoc, tinh hoc
sach dao » lanh dao
thu hang » thi hang, thuc hanh, thu huong
hang hoa » hang khoa, thanh hoa, hang va
khoa hoc » hoa hoc
va nhan » van nhan, ca nhan, va phan
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.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((dich hoc) or (sach dao)) tap, nghien thu hang hoa nganh khoa hoc xa hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((dich hoc) OR (sach dao)) tap, nghien thu hang hoa nganh khoa hoc xa hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: tu ((dich hoc) or (sach dao)) tap, nghien thu hang hoa nganh khoa hoc xa hoi va nhan va*.