Custom field in customer search

I have added vehicle no as a custom field in customer. So I want to search by vehicle no in customer list instead of customer name.
how can I add custom field to search. Can anybody help me?

I have tried this still not able to find it

Screenshot from 2017-10-04 12:26:31

Screenshot from 2017-10-04 12:27:00

Tick your custom field as “in standard filter”.

This is the example:

is the search bar for Vehical No appears in the customer list page?