Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
va triet » va thiet, va trien, ve triet
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
su sai » su tai, su hai, su mai
su dai » sau dai, si dai, su tai
luc va » duc va, tuc va, loc va
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sai) or (su dai)) ky nang cau hoi. hieu ((va cham) or (va cac)) luc va hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su dai)) ky nang cau hoi. hieu ((va cham) OR (va cac)) luc va hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: ((su sai) or (su dai)) ky nang cau hoi. hieu ((va cham) or (va cac)) luc va hanh vi va triet*.