Perhaps you should try some spelling variations:
sach dat » sach danh, sach bai, sach xa
sach dao » lanh dao
hoc danh » hoc dan, hoc anh, hoc hanh
danh hoa » thanh hoa, khanh hoa, nganh hoa
nhan van » nhan dan, nhan va, phan van
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va nhan » van nhan, ca nhan, va phan
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: "tu ((sach dat) OR (sach dao)) tay, nghien cuu mon hoc danh hoa hoc xa hoi va nhan van~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach dat) OR (sach dao)) tay, nghien cuu mon hoc danh hoa hoc xa hoi va nhan van*.