Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang o hoi. hieu ve ((pham duy) OR (pham duc)) va thanh dai cua triet~.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang o hoi. hieu ve ((pham duy) or (pham duc)) va thanh dai cua triet*.