Before looking for duplicate questions, it should be easy to reduce them by improving the Search. I believe it is very hard in SO to find if a question: adding

Before looking for duplicate questions, it should be easy to reduce them by improving the Search. I believe it is very hard in SO to find if a question: adding words in may request should reduce the number of results instead of increase it. I mean "C# Dictionary performance" should be same than "+C# +Dictionary +performance".