我认为最简单的解决方案是.

I think the easy solution is to.

string search = "\"business adminstration\"";
search = search.Replace("\"", string.Empty);
search = search.Replace(" ", " and ");

Console.WriteLine(search);

输出:

商业和行政管理

或者也许使用正则表达式.

Output:

business and adminstration

Or perhaps work with regular expression.