Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
gia hanh » gia thanh, giao hanh, gia anh
vai cua » dai cua, hai cua, lai cua
tuc gia » tac gia, duc gia, toc gia
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
lai hoi » dai hoi, lai hoa, lai roi
sach ty » sach y, sach tu, xach tay
mai hoi » mai khoi, dai hoi, mai doi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) OR (sach thu)) nang ((mai hoi) or (lai hoi)). hieu va cac tuc gia hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach thu)) nang ((mai hoi) OR (lai hoi)). hieu va cac tuc gia hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) OR (sach thu)) nang ((mai hoi) or (lai hoi)). hieu va cac tuc gia hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) OR (sach thu)) nang ((mai hoi) or (lai hoi)). hieu va cac tuc gia hanh vai cua tre*.