Too Much of a Good Thing...
Each ‘engine’ is unique but shares something with all it’s brethren…..
Type in a general word like “food” and you will be greeted with a Gazillion hits-3/4’s of which are totally useless. Be prepared to spend some time filtering the list to get to the information you want.
Most search site provide a ‘Tips’ selection. It will be on the main page somewhere between one of the numerous annoying ADS blinking & flashing away. [somebody has to pay the bills so you can get this stuff free..]