Perhaps you should try some spelling variations:
su triet » su tien, ve triet
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
hanh va » hang va, hanh vi
duc van » duc va, duc tan, duc manh
su viet » so viet
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
va cao » va co, va dao, va bao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach vu nang x hoi. hieu ((va cao) or (va cac)) duc van hanh va ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu nang x hoi. hieu ((va cao) OR (va cac)) duc van hanh va ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: te sach vu nang x hoi. hieu ((va cao) or (va cac)) duc van hanh va ((su triet) or (su viet))*.