Hey bestwebsoft,
I just downloaded and installed your plugin to use with ACF. While the plugin certainly does search the custom fields and return the correct results, I was unable to display the information in the custom fields. It would seem that your plugin breaks some of the ACF functionality, in particular the ‘have_rows’ function.
Not sure if this is something you would like to resolve, but thought it might be worth mentioning.
Regards,
Blaine