How to keep results of AJAX data after making selection?

How Do I...
#1

I have a problem with the Select2 drop-down not keeping the list of results after a search is done and a selection is made.
So I would like to know how to prevent the list from disappearing or to add it back to the list. I am using AJAX to get the data based on what the user has searched for.

Below is my code sample

$('.Occupation').select2({
        placeholder: 'Select Occupation',
        minimumInputLength: 3,
        dataCache: self.occupationResultData(),
        ajax: {
            url: '/Quote/SearchOccupation',
            data: function (params) {
                var query = { keyword: params.term }
                return query;
            },
            dataType: 'json',
            processResults: function (data) {
                self.occupationResultData(self.MapOccupationSearchResults(data));

                return {
                    results: self.occupationResultData()
                };
            },
            delay: 750
        }
    });