Hi, Marc

As far as i was aware, the "or" should be the "default behaviour", 

but i am not 100% sure, to be honest.  Let's try this, and let me know how it looks from your end - we do have a workaround to "change between OR & AND".

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Depending on if you use "server-side processing" for your tables, there could be a couple of different solutions.

1. If you use server-side processing, you can edit a piece of the code in this file path :

 "   wp-content/plugins/wpdatatables/source/class.wpdatatable.php   "

Find this line

$search .= " OR ";

and overwrite it with this

$search .= " AND ";

2.

If you have tables without server-side processing, some custom logic can be made ; 

but we don't provide custom solutions as part of our plugin support... we usually recommend WP Kraken for custom work, but we do not know their price.

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Let me know if you use sever-side processing, and if you checked in the code, how it is set for you right now ?

Thank you