Perhaps you should try some spelling variations:
hoa doanh » toan doanh, hoa dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach doi » sach hoi, sach moi, sach dao
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
te sach » toc sach
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoa » mon hoc, dong hoa, cong hoa
hoi cua » hoi chuc
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: te sach doi tap, nghien cuu mon hoa doanh hoa hoc xa hoi cua ((nhan dan) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach doi tap, nghien cuu mon hoa doanh hoa hoc xa hoi cua ((nhan dan) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: te sach doi tap, nghien cuu mon hoa doanh hoa hoc xa hoi cua ((nhan dan) or (phan dau))*.