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
hieu ve » hieu va, hieu van
tao hoi » tao khoi, tao boi, tay hoi
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ((ky sang) OR (ky tang)) tao hoi. ((hieu ve) or (lieu va)) cam xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky sang) OR (ky tang)) tao hoi. ((hieu ve) OR (lieu va)) cam xuc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky sang) OR (ky tang)) tao hoi. ((hieu ve) or (lieu va)) cam xuc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky sang) OR (ky tang)) tao hoi. ((hieu ve) or (lieu va)) cam xuc va hanh vai cua tre*.