Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
lang xa » lang ha, dang xay, lang van
xuc ban » duc ban, cuc ban, quoc ban
hanh di » hanh vi, hanh de, hang di
san ky » sang ky, dan ky, ban ky
va cao » va cac, va dao, va bao
di cua » dai cua, doi cua, de cua
va co » vo co

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: tu ((san ky) OR (van ky)) lang xa hoi. lieu ((va cao) OR (va co)) xuc ban hanh di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) or (van ky)) lang xa hoi. lieu ((va cao) OR (va co)) xuc ban hanh di cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) or (van ky)) lang xa hoi. lieu ((va cao) OR (va co)) xuc ban hanh di cua triet*.