Hi Farhad,
To just open a webpage, you can use the function "web", as described in the following documentation page:
Depending on how the specific web page has implemented the search functionality, you may be able to use the function "webwrite" to mimic using the search bar and provide input in a Post name-value pair. For more information about "webwrite", see the following documentation page:
Another option is to use Java Robots to programmatically move your mouse, click the search bar, and enter text. While this workflow is not documented or officially supported, you can read more about this process on the following MATLAB Answers page: