Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cach dung » sach dung, cach mang, tac dung
hanh hoai » thanh hoai, hanh hoa, nhanh hoan
cach dua » cach cua, cac du, cach de
ban hanh » ban hang
hoai cua » hoi cua, hoa cua, hai cua
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y nang x hoi. hieu va ((cach dua) or (cach dung)) ban hanh hoai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang x hoi. hieu va ((cach dua) OR (cach dung)) ban hanh hoai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang x hoi. hieu va ((cach dua) or (cach dung)) ban hanh hoai cua tre*.