Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
dua ban » cua ban, qua ban, mua ban
van cay » van cau, van bay, van ca
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang

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 sang ma hoa. hieu van cay ((dua ban) OR (dia ban)) thanh vai ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ma hoa. hieu van cay ((dua ban) OR (dia ban)) thanh vai ((cua tre) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang ma hoa. hieu van cay ((dua ban) OR (dia ban)) thanh vai ((cua tre) or (cau treo))*".