Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
danh nhan » doanh nhan, thanh nhan, dung nhan
sach hoc » cach hoc, sach hoi, mach hoc
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
hoc hang » hoc hanh, hoc bang, hoc tang
va hoc » van hoc
hoc xa » hoc ma

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoc tap, nghien cuu tong hoc hang va hoc xa hoi ((danh nhan) OR (benh nhan)) tai~.
• Adding a wildcard symbol may retrieve word variants: thuat sach hoc tap, nghien cuu tong hoc hang va hoc xa hoi ((danh nhan) or (benh nhan)) tai*.