Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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: tu sach ky ((nang x) OR (lang xa)) hoi. hieu ve ((cam duc) OR (pham duc)) va hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang x) or (lang xa)) hoi. hieu ve ((cam duc) OR (pham duc)) va hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang x) or (lang xa)) hoi. hieu ve ((cam duc) OR (pham duc)) va hanh vai cua tre*.