Perhaps you should try some spelling variations:
hanh hoi » hanh thoi, hanh noi, hanh hoa
su sach » so sach, vu sach
hoi cua » hoi chuc
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
ty nang » ky nang, ty hang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
va lam » van lam, va lap

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 ((ty nang) OR (ty xang)) ma hoi. hieu va lam ((duc va) OR (truc va)) hanh hoi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty xang)) ma hoi. hieu va lam ((duc va) or (truc va)) hanh hoi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty xang)) ma hoi. hieu va lam ((duc va) or (truc va)) hanh hoi cua tre*.