Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dinh dau » dinh dat, dinh du, danh dau
tham tuc » tham thuc, thai tuc, nham thuc
dau cuu » dau cua, dau cuoi
va dinh » van dinh, va kinh, va tinh
cuu tre » cua tre, cau tren, cau treo
thi van » thi lan, thi hanh, thi nang
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
tuc va » thuc va, truc va, tuc xa

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: thuoc sach ky ((nang xa) OR (nang x)) hoi. ((thien van) OR (thi van)) tham tuc va dinh dau cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((nang xa) OR (nang x)) hoi. ((thien van) or (thi van)) tham tuc va dinh dau cuu tre~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang xa) OR (nang x)) hoi. ((thien van) or (thi van)) tham tuc va dinh dau cuu tre*.