I would like to know how the search criteria work here. I’ve noticed that when I search for some quizzes, they don’t appear in the search bar. I have to click “Search on Google” to find them. Is there a reason why they don’t show up directly in the search bar?
It's based on the first three letters you type, and then it loads a file with all the quizzes with those letters and filters it based on further typing.
There is a limit to how many quizzes can appear in each file. The gazillionth country quiz probably won't appear.
To decide which quizzes appear we rank on a variety of factors including newness, times taken, and rating. New quizzes always appear.
I might have to think about how to improve this.