Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
che duoc » che thuoc, che do, te duoc
ban hanh » ban hang
hoi cua » hoi chuc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
hieu ke » hieu kem, chieu ke, hieu ky
ky sang » ky dang, ky tang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa
ke che » ke he

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) or (ky nang)) ma hoi. hieu ke che duoc ((va hanh) or (ban hanh)) hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky sang) OR (ky nang)) ma hoi. hieu ke che duoc ((va hanh) OR (ban hanh)) hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky sang) or (ky nang)) ma hoi. hieu ke che duoc ((va hanh) or (ban hanh)) hoi cua tre*.