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 dauh » va danh, va doanh
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 dau » va dao
ca tu » ca tru, cau tu, ca thu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu khac)) ky nang doc loi. hieu qua ca tu ((va dauh) or (va dau)) vai cua tre~.
• 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 dauh) OR (va dau)) 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 dauh) or (va dau)) vai cua tre*.