Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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) or (co sach)) ky dang xa hoi. hieu va cam xuc va hanh ve ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ky dang xa hoi. hieu va cam xuc va hanh ve ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (co sach)) ky dang xa hoi. hieu va cam xuc va hanh ve ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ky dang xa hoi. hieu va cam xuc va hanh ve ((cua triet) OR (cua viet))*.