Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lky nang » ly nang, ki nang, ke nang
hang doi » hang di, hang loi, huong doi
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
va hang » van hang, va nang, va lang
doi cua » dai cua, hoi cua
ve cao » va cao, ve bao, ve cac
cua te » cua tu
su va » su van, tu va

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: thu sach ((ky nang) OR (lky nang)) cao hoi. hieu ve cao su va hang doi cua te~.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky nang) or (lky nang)) cao hoi. hieu ve cao su va hang doi cua te*.