Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
van cac » van hac, van cau, dan cac
van bac » van ban, van bao, van hac
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
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: so sach y nang x hoi. hieu ((van cac) or (van bac)) tu ((va hanh) OR (van hanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang x hoi. hieu ((van cac) OR (van bac)) tu ((va hanh) OR (van hanh)) vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang x hoi. hieu ((van cac) or (van bac)) tu ((va hanh) OR (van hanh)) vai cua triet*".