Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
nghe nam » nghe lam, nghiep nam, nghe nano
van danh » van doanh, van anh, van hanh
nam danh » nam dinh, nam dan
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
dai hoi » dai hoc, dai hai, dai moi
cuu tre » cua tre, cau tren, cau treo
he nam » ha nam

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 ky nang dai hoi. hieu ((he nam) or (nghe nam)) thu ((van danh) or (nam danh)) sai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang dai hoi. hieu ((he nam) OR (nghe nam)) thu ((van danh) OR (nam danh)) sai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang dai hoi. hieu ((he nam) or (nghe nam)) thu ((van danh) or (nam danh)) sai cuu tre*.