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
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
dua ban » cua ban, qua ban, mua ban
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.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky tang ma hoa. ((hieu ve) or (lieu va)) chay ((dua ban) OR (dia ban)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoa. ((hieu ve) OR (lieu va)) chay ((dua ban) OR (dia ban)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ma hoa. ((hieu ve) or (lieu va)) chay ((dua ban) OR (dia ban)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ma hoa. ((hieu ve) or (lieu va)) chay ((dua ban) OR (dia ban)) hanh vai cua tre*.