Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
hieu ve » hieu va
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
va hanh » va thanh, va danh, ban hanh
ky lang » ky nang, ky dang, ky tang
tu sach » thu sach, su sach, te sach
vi su » va su, ve su, ki su

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

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