using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class Test
{
	public static void Main()
	{
		var list = new List<string> {"abcdef", "abc", "ab", "cd ab"};
		
		var searchForList = new List<string> { "ab", "abc", "ab cd" };
		
		foreach(var searchFor in searchForList)
		{
			// word must contain all the string in search words
			var result = list.Where (w => searchFor.Split().All (s => w.Contains(s)));
			Console.WriteLine(string.Format("Searching for \"{0}\":", searchFor));
			foreach(var s in result)
			{
				Console.WriteLine(s);
			}
			Console.WriteLine();
		}
	}
}