Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
nam mua » nam cua, nam xua, nam luat
sach ky » sac ky, sach y, sach kem
nam qua » nam quan, nam cua, nam xua
hieu ha » hieu hoa, hieu va, hieu ca
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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) or (sach ty)) nang x hoi. hieu ha ((nam qua) OR (nam mua)) va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang x hoi. hieu ha ((nam qua) OR (nam mua)) va hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach ty)) nang x hoi. hieu ha ((nam qua) OR (nam mua)) va hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang x hoi. hieu ha ((nam qua) OR (nam mua)) va hanh tai cua tre*.