Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
hanh de » hanh ve, hanh kem
ky lang » ky dang, ky tang, tay lang
cau xuc » cam xuc, cau luc, cau truc
va cau » van cau, va cac, va dau

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: thu sach ((ky lang) OR (ky nang)) xa hoi. hieu va cau xuc van hanh de ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky lang) or (ky nang)) xa hoi. hieu va cau xuc van hanh de ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky lang) or (ky nang)) xa hoi. hieu va cau xuc van hanh de ((cua triet) OR (su triet))*.