using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public class Model {

        public string Number { get; set; }

    }

    private static List<Model> getSearchResults(List<Model> models) 

    {

        List<Model> result = models.Where(m => m.Number.Contains("3330")).ToList();

        return result;

    }

    public static void Main()

    {

        List<Model> list = new List<Model>() {

            new Model() { Number = "13330A"},

            new Model() { Number = "13230A"},

            new Model() { Number = "3330A"},

            new Model() { Number = "543330"},

            new Model() { Number = "48913"},

            new Model() { Number = "97798133"},

            new Model() { Number = "542130"}

        };

        foreach(Model v in getSearchResults(list)) {

            Console.WriteLine(v.Number);

        }

    }

}