Jot down alternative phrases, wordings, and related ideas before you search and also as you go along. That is an impossible task to accomplish.
Most search engines have robots or spiders which go out and find Internet resources.
That's one reason why it is wise to learn how to use more than one search engine. It will increase your chances of getting what you want in the first few screens of results. For example, a computer software company may have a web site. HELP will actually help you choose the right search technique and will teach you tricks. If you don't look at the HELP screens, you probably won't know what a search engine can and cannot do.