Perhaps you should try some spelling variations:
sieu viet » su viet, dien viet, bien viet
cua triet » cua viet, su triet, va triet
sach dao » lanh dao
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
di cua » dai cua, doi cua, de 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: ((so sach) OR (co sach)) ky nang xa hoi. sieu viet ((sach dao) OR (cac nuoc)) va danh di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ky nang xa hoi. sieu viet ((sach dao) or (cac nuoc)) va danh di cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ky nang xa hoi. sieu viet ((sach dao) or (cac nuoc)) va danh di cua triet*.