Perhaps you should try some spelling variations:
nang doc » nang luc
su sach » so sach, vu sach
vu khac » vu kham, vu khanh, bui khac
doc loi » duc loi
va danh » va dinh, va hanh, dia danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
qua ca » qua cac, qua cua, qua cai
va dan » ca dan, va dao, va dau
ca tu » ca tru, cau tu, ca thu

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: ((su sach) OR (vu khac)) ky nang doc loi. hieu qua ca tu ((va danh) OR (va dan)) vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu khac)) ky nang doc loi. hieu qua ca tu ((va danh) OR (va dan)) vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khac)) ky nang doc loi. hieu qua ca tu ((va danh) OR (va dan)) vai cua tre*.