Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
van hanh » van thanh, ban hanh, van anh
ve triet » va trien, su triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va hanh » va thanh, va danh, ban hanh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
nam tu » nam thu, nam thuc
ve ve » de ve, va ve, ke ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang xa hoi. ((hieu van) or (lieu va)) nam tu ((va hanh) OR (van hanh)) ve ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. ((hieu van) OR (lieu va)) nam tu ((va hanh) OR (van hanh)) ve ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. ((hieu van) or (lieu va)) nam tu ((va hanh) OR (van hanh)) ve ve triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. ((hieu van) or (lieu va)) nam tu ((va hanh) OR (van hanh)) ve ve triet*.