Find items in list where word exist and ignor special chars

I have list of MyItems

My item 
{
   string name;
   int age; 
} 

List<MyItem> list = new List<MyItem>();
list.Add(new Test("name", 2));
list.Add(new Test("ŚćĄa", 4));
list.Add(new Test("May NĄmĄa bb" , 7));
list.Add(new Test("May maa cc" , 7));

for now with var NewList = list.Where(m => m.name.ToLower().Contains(textToSearch.ToLower())).ToList();

I can ignore lower and upper case, but how to ignore special chars like ĄĆŚ when I set textToSearch = "aa"; I will get item two, three and four, but when I set textToSearch = "ĄA"; I want to get only item two and four