Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sieu viet » dien viet, bien viet, viet viet
sach dao » lanh dao
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nang xa » nang x, lang xa, nang ma
su viet » so viet
sach ky » sac ky, sach y, sach ty
va xanh » va danh, va hanh, va anh
xanh di » danh di, vanh dai, xanh tai
so sach » so sanh, bo sach, co sach
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. ((sieu viet) OR (su viet)) ((sach dao) or (cac nuoc)) va xanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. ((sieu viet) OR (su viet)) ((sach dao) OR (cac nuoc)) va xanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. ((sieu viet) OR (su viet)) ((sach dao) or (cac nuoc)) va xanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. ((sieu viet) OR (su viet)) ((sach dao) or (cac nuoc)) va xanh di cua triet*.