Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
thi nang » thi cong, ki nang, thi hanh
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
thi van » thi lan, thi hanh
cam dua » ca dua, cay dua, chay dua
dua ban » dia ban, cua ban, qua ban
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
y tang » ky tang, 6 tang, 7 tang

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 y tang ma hoa. ((thien van) OR (((thi van) OR (thi nang)))) cam dua ban thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y tang ma hoa. ((thien van) or (((thi van) OR (thi nang)))) cam dua ban thanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y tang ma hoa. ((thien van) or (((thi van) OR (thi nang)))) cam dua ban thanh vai cua tre*.