laravel – an eloquent query with null values

I create an eloquent query, but I do not know how to solve the following problem.

$ trips = Trip :: where ("like,"% $ customer.%)
-> where ('pro', 'like', '%', '% pro',% '#')
-> whereHas (& # 39; addressescar; function ($ q) use ($ source) {$ q-> Where (& # 39 ;, & # 39 ;, like, & # 39; 39;% & # 39;. $ Source. & # 39;% & # 39;);})
-> page (50);

The problem is that if the field & # 39; province & # 39; of the table & # 39; addressescar & # 39; is null, he does not show it to me.

If I search all the trips of a specific customer or supplier and that one of their trips has not assigned a "province" in the table "address" to "this record do not save the request.