Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh dai » hanh tai, hanh dao, vanh dai
tu bach » vu bach, tu cach, tu hach
va cham » va chat
va hanh » van hanh, va thanh, va danh
va tham » van tham, va thanh, va thuat
dai va » mai va
soc va » hoc va, loc va, doc va
tu bac » tu ban, tu cac, tu bat
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: ((tu bac) or (tu bach)) ky nang x hoi. hieu ((va cham) OR (va tham)) soc va hanh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu bach)) ky nang x hoi. hieu ((va cham) OR (va tham)) soc va hanh dai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bac) or (tu bach)) ky nang x hoi. hieu ((va cham) OR (va tham)) soc va hanh dai va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu bach)) ky nang x hoi. hieu ((va cham) OR (va tham)) soc va hanh dai va triet*.