:: Need Help with Text content filtering ::

Hello guys ,

I know that this is easy for most of you but i really need some help here …

I have a huge list with names in fact domain names which i own , i need a software program or a way to sort them as i wish whenever i wish to , for example i would like to enter the keyword “finance” and it should show me the names which have this term inside
Can anyone help me out ? i mean is there any program out there which does this filtering ?
thank you very much in advance …