Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, pham duy, phan duc
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
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
x hoi » xa hoi, o hoi, x ho

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x hoi. hieu ve ((cham duc) OR (cham soc)) van hanh dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ve ((cham duc) OR (cham soc)) van hanh dai cua triet*.