Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
thu sach » tu sach, thuat sach, thuoc sach
thai cua » than cua, tai cuc, tri cua
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
dua ban » dia ban, qua ban, mua ban
cua tre » cua te, cuu tre, cua triet
van ca » van cau, van cua, van ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky sang ma hoa. hieu ((van ca) or (dan ca)) ((dua ban) OR (cua ban)) thanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky sang ma hoa. hieu ((van ca) OR (dan ca)) ((dua ban) OR (cua ban)) thanh thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky sang ma hoa. hieu ((van ca) or (dan ca)) ((dua ban) OR (cua ban)) thanh thai cua tre*".