Perhaps you should try some spelling variations:
nghe nano » nghe dan, nghe san, nghe nhan
nang mai » nang ma, nang tai, lang mai
nghe nam » nghe lam, nghiep nam, nghe nhan
nam danh » nam dinh, nam dan
xa danh » va danh, dia danh, van danh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet

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 ((nghe nam) or (nghe nano)) thu ((xa danh) OR (nam danh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang mai hoi. hieu ((nghe nam) OR (nghe nano)) thu ((xa danh) OR (nam danh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang mai hoi. hieu ((nghe nam) or (nghe nano)) thu ((xa danh) OR (nam danh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang mai hoi. hieu ((nghe nam) or (nghe nano)) thu ((xa danh) OR (nam danh)) dai cua tre*.