They can only do what you tell them to. Humans see the world as many shades of gray, and whenever we run into anything that is literal, like a computer, it appears so sure of itself that we think it must be right. They only know what you say. And they don't what you mean to spell. They only know what you spell.
Nothing is free.
Most quality databases are created by private companies who lease them to providers, such as libraries. The information contained in the databases is covered by copyright law, and the creators of the information must be compensated for its use. Therefore, databases are password protected. Your access is your tuition. There is an exception to every rule.