Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu nghe » lieu nghe, hiem ngheo, nhiem nghe
nghe nam » nghe lam, nghiep nam, nghe nano
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
xa danh » va danh, dia danh, nam danh
sai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, ma hoa, me hoi
va dan » ca dan, va dao, va dau

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