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

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) OR (lieu va)) cau xuc van hanh de cua 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) OR (lieu va)) cau xuc van hanh de cua triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky lang) or (ky nang)) xa hoi. ((hieu va) OR (lieu va)) cau xuc van hanh de cua triet*.