Perhaps you should try some spelling variations:
sach hoi » sach moi, cach thoi, hoach hoi
sach doi » sach moi, sach dao, sach bai
hoc danh » hoc dan, hoc anh, hoc hanh
danh hoa » thanh hoa, khanh hoa, nganh hoa
phan dau » phan tu, hang dau
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
ca phan » cac phan, cao phan, cap phan
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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 hoi) OR (sach doi)) tap, nghien cuu mon hoc danh hoa hoc xa hoi ca phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach hoi) OR (sach doi)) tap, nghien cuu mon hoc danh hoa hoc xa hoi ca phan dau".
• Adding a wildcard symbol may retrieve word variants: te ((sach hoi) OR (sach doi)) tap, nghien cuu mon hoc danh hoa hoc xa hoi ca phan dau*.