Perhaps you should try some spelling variations:
sach duoc » sach nuoc, sach dung, sinh duoc
hoc nhanh » hoc nganh, hoc phan
nhanh hoa » nhanh hoan, thanh hoa, khanh hoa
sach dao » lanh dao
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
nhan dan » phan dau, gian dan, nhan tai
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: tu ((sach duoc) or (sach dao)) tap, nghien cuu tong hoc nhanh hoa hoc xa hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach duoc) OR (sach dao)) tap, nghien cuu tong hoc nhanh hoa hoc xa hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu ((sach duoc) or (sach dao)) tap, nghien cuu tong hoc nhanh hoa hoc xa hoi ca nhan dan*.