So now here is way how to use Google to search the serials of Softwares, games etc. or any other stuff.
In order to search any serial just type in the in search bar in following manner :

94FBR Application's name 94FBR

here application's name is name of the stuff whose serial u need to search. for eg. if i need to search serial of winrar i'll type like this in Google search bar :

94FBR Winrar 94FBR

Basically the code 94FBR is used or denoting the serials so when we use that code then Google understands that it needs to search for the links that will contain the serials somewhere. So remember that the search result wont display serials on ur screen but the search result will provide u many links that could contain the serial.