Click in the horizontal box near the top of the screen, and put in a word or a couple of words. You're on your way to getting a list of links to material on your subject. Scroll down through this list, and click on any of the links that look promising. You can be quite specific in your search terms You may find you get many hundreds or even thousands of results. When this stops happening, you will have reached your goal.
Search engines are databases that contain indexed information.
There are many search engines on the available on WWW, for example Goeureka and Excite . They all differ in their size, coverage and in the ways you combine search terms. Advantages and disadvantages of Internet it is always changing. You will find that the Internet is dominated by people in developed countries, especially English-speaking ones. Not everyone can have access to it.