If I've understood correctly, you're interested in ways to increase search efficiency that you could use repetitively to solve different problems.
You certainly know that many things can be found using google.com. Even if you do not find what you are looking for, you will often find a useful information that will show you where to look.
And if google.com does not find something - see on yandex.ru.
Note - be cautious. yandex.ru returns other results, among others because worse than google.com, it filters out infected or illegal websites.