Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
nghe nam » nghe lam, nghiep nam, nghe nano
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
xa danh » dia danh, nam danh, van danh
va danh » va dinh, va dan, va hanh
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: tu sach ky nang mai hoi. hieu ((he nam) or (nghe nam)) thu ((xa danh) OR (va danh)) sai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang mai hoi. hieu ((he nam) OR (nghe nam)) thu ((xa danh) OR (va danh)) sai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang mai hoi. hieu ((he nam) or (nghe nam)) thu ((xa danh) OR (va danh)) sai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang mai hoi. hieu ((he nam) or (nghe nam)) thu ((xa danh) OR (va danh)) sai cuu tre*.