Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
hieu vien » hieu hien, hieu viec, thieu nien
thanh le » thinh le, thanh ve, thanh de
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cac luc » cau luc, cac nuoc, cac cuoc
so sach » so sanh, bo sach, co sach
su sach » vu sach
le cua » ly 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: ((su sach) OR (so sach)) ky dang xa hoi. hieu vien ((cac luc) OR (coc luc)) ban thanh le cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky dang xa hoi. hieu vien ((cac luc) OR (coc luc)) ban thanh le cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky dang xa hoi. hieu vien ((cac luc) OR (coc luc)) ban thanh le cua triet*.