Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
ty hang » ly hang, ty xang, thi hang
duy van » duy vat, dung van
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((duy van) or (ty hang)) ma hoi. ((hieu ve) or (hieu va)) cam duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((duy van) OR (ty hang)) ma hoi. ((hieu ve) OR (hieu va)) cam duc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((duy van) or (ty hang)) ma hoi. ((hieu ve) or (hieu va)) cam duc va hanh vai cua tre*.