Perhaps you should try some spelling variations:
nghe nam » nghe lam, nghiep nam, nghe nano
danh sai » dung sai, danh bat, danh dau
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, mang may
xa danh » va danh, dia danh, nam danh
cuu tre » cua tre, cau tren, cau treo
he nam » ha nam
thu xa » thu xac, thu ha, thu xe

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