Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach ty, sach kem
cao tuc » dao tuc, cao duc, cao suc
va cao » va cac, va co, va dao
va dan » ca dan, va dao, va dau
x hoi » xa hoi, o hoi, x ho
va ve » va de, va le, va vi

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: su ((sach ky) OR (sach y)) nang x hoi. lieu va cao tuc ((va hanh) OR (va dan)) va ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach y)) nang x hoi. lieu va cao tuc ((va hanh) or (va dan)) va ve triet~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach y)) nang x hoi. lieu va cao tuc ((va hanh) or (va dan)) va ve triet*.