Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cao xuc » cam xuc, cao duc, cao suc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so viet » hoc viet
va cao » va cac, va co, va dao

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

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