Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, nuoc sach
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, quoc ban
van cam » van nam, van lam, van cau
cuu tre » cua tre, cau tren, cau treo
ly nang » ky nang, ly hang, ly vang
vi cuu » vi luu, vinh cuu
x hoi » o hoi, x ho, 5 hoi

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: ((toc sach) OR (thuoc sach)) ly nang ((x hoi) OR (xa hoi)). hieu van cam xuc ban thanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ly nang ((x hoi) or (xa hoi)). hieu van cam xuc ban thanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) ly nang ((x hoi) or (xa hoi)). hieu van cam xuc ban thanh vi cuu tre*.