Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
tang van » dang van, hoang van, trong van
vai cua » dai cua, hai cua, lai cua
dua ban » dia ban, cua ban, qua ban
cam dua » ca dua, cay dua, chay dua
van cam » van nam, van lam, van cau
sach ky » sac ky, sach ty, sach kem
tang ma » mang may
cua tre » cua te, cuu tre, cua triet

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) ((tang ma) OR (tang van)) hoa. hieu van cam dua ban thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) ((tang ma) OR (tang van)) hoa. hieu van cam dua ban thanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) ((tang ma) OR (tang van)) hoa. hieu van cam dua ban thanh vai cua tre*.