How do you know what/how to ask? I'm learning all the time, wide range, and I often have to learn more, or ask people who know more, just to know enough to ask

How do you know what/how to ask? I'm learning all the time, wide range, and I often have to learn more, or ask people who know more, just to know enough to ask Google. What good is Google if it can't help with the furthest reaches of your knowledge, if you can't form questions in a way it (or any other search engine) can answer?