Perhaps you should try some spelling variations:
van hoanh » van hanh, van doanh, van hoan
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hoa duc » hoa duoc, hoai duc, ho duc
va hanh » van hanh, va thanh, va danh
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu van hoa duc ((va hanh) or (van hoanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu van hoa duc ((va hanh) OR (van hoanh)) dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu van hoa duc ((va hanh) or (van hoanh)) dai cua triet*.