Google Search Features

Google search features is really a very useful method in order to make your search faster and easier. Before learning about the google search, I was facing a lot of difficulty in reaching my required results fast. I noticed that maybe I had some errors in the words that am typing in the search box. I am using now the google search features in my work and even in my real life. The main problem in google search features that you have to memorize all the codes for searching. Tell now I am mixing between some of the symbols and I am typing some codes not in their correct places.