using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<string> list1 = new List<string>();

            list1.Add("Sunday is far away");

            list1.Add("Today is Monday");

            list1.Add("Tuesday is too near");

​

            List<string> list2 = new List<string>();

            list2.Add("Sunday");

            list2.Add("Monday");

            list2.Add("Tuesday");

​

            var result1 = list1.Where(x => list2.Any(y => x.Contains(y))).ToList(); //no results

            var result2 = list2.Where(x => list1.Any(y => y.Contains(x))).ToList(); //give values of list2. But I need values of list1

        Console.WriteLine(String.Join(",",result1));

        Console.WriteLine(String.Join(",",result2));

    }

}