Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
nang doc » nang luc
su triet » su tien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
doc hoi » duoc hoi, hoc hoi, doc hai
su viet » so viet

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: so sach ky nang doc hoi. ((hieu ve) OR (hieu van)) cam xuc van thanh vi ((su triet) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang doc hoi. ((hieu ve) or (hieu van)) cam xuc van thanh vi ((su triet) OR (su viet))~".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang doc hoi. ((hieu ve) or (hieu van)) cam xuc van thanh vi ((su triet) OR (su viet))*.