Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thuoc va » thuc va, thuoc ma, thuong va
dinh hai » dinh thai, tinh hai, dinh ha
su sach » so sach, vu sach
bo sach » co sach, hoc sach
hieu va » lieu va, hieu qua
va dinh » van dinh, va kinh, va tinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
va lam » van lam, va lap
x hoi » xa hoi, o hoi, 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: ((su sach) OR (bo sach)) ky nang ((x hoi) OR (x ho)). hieu va lam thuoc va dinh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (bo sach)) ky nang ((x hoi) OR (x ho)). hieu va lam thuoc va dinh hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (bo sach)) ky nang ((x hoi) OR (x ho)). hieu va lam thuoc va dinh hai cua tre*.