I think the way to approach it is if you can't find the EXACT strain, group them into classes of strains-
For example, Kushes would be in one class that you can expect to have reasonably similar effects- Anti-nausea, happy, etc. Then the Hazes would be in another- Trippy, heady, etc. And so on. You can try to find the parents of each hybrid strain listed, and look up their effects, and assume that the offspring would carry them to a certain degree. Sorry I can't help more, but it's a start.