Perhaps you should try some spelling variations:
thuoc sinh » hoc sinh, thu sinh, thuoc sach
doanh khoa » toan khoa
nuoc sach » nguoi sach, hoc sach, cuoc cach
hoc doanh » hoa doanh, hoc danh, hoc dan
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va nhan » van nhan, ca nhan, va phan
hoa va » hoa van, hoa xa, hoa vo

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((nuoc sach) or (thuoc sinh)) doi tap, nghien cuu mon hoc doanh khoa hoc ma hoa va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (thuoc sinh)) doi tap, nghien cuu mon hoc doanh khoa hoc ma hoa va nhan dan.
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) or (thuoc sinh)) doi tap, nghien cuu mon hoc doanh khoa hoc ma hoa va nhan dan*.