Perhaps you should try some spelling variations:
hieu nghe » lieu nghe, hiem ngheo, nhiem nghe
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
nghe nam » nghe lam, nghiep nam, nghe nano
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
mai hoi » mai khoi, dai hoi, lai hoi
xa danh » dia danh, nam danh, van danh
va danh » va dinh, va dan, va hanh
sai cua » dai cua, hai cua, lai cua

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 ty nang mai hoi. hieu nghe nam thu ((xa danh) or (va danh)) sai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang mai hoi. hieu nghe nam thu ((xa danh) OR (va danh)) sai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang mai hoi. hieu nghe nam thu ((xa danh) or (va danh)) sai cua triet*.