Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
van cam » van lam, van cau, van dam
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky nang xa hoi. thien ((van cam) OR (van nam)) duc va hanh di ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky nang xa hoi. thien ((van cam) OR (van nam)) duc va hanh di ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky nang xa hoi. thien ((van cam) OR (van nam)) duc va hanh di ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang xa hoi. thien ((van cam) OR (van nam)) duc va hanh di ((cua triet) or (cua viet))*.