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Hey there, Finnish crusher.
You won't have many (old ones) to choose from, since you're (at the moment) in the 400s.
If anyone were nice enough to divulge that information here (on the website), there are forces on the other side that would also do something with it; (as in) not too long after the info is shared here (but not instantly), the level(s) would be altered to the point of you not collecting greens until after sugar crush (completing all level objectives).
And of course, the sugar crush period won't last very long nowadays; definitely not how it used to be.
Here's a similar post (linked below):
Here's another one (for good measure):
So if you happen to find any of those levels you seek, good on you; not that you necessarily have to keep 'em to yourself, but don't share that here...
You will have to play new levels. King policy is to stop players getting up the ranking using the method you seek. They have removed or changed all the levels that once were good for collecting green candies while also introducing the 30x multiplier advantage for new levels.