Like the title says there is no Armor + Ap items and thats kind of sad cause there are some creazy combination but no Ap + Armor. Will there be an Item like this?

Items are evaluated and added based on their overall usefullness in the general pool of champions as well as for balancing.

The same could be said for Attack Damage and Magic Resistance. The idea is that most champions looking for ability power might not be as interested in armor, or if they would need to be interested in armor, that serious combinations of both could be overpowered.

there are item that have armor, health + health regen , Cd and slowdown and u call ap + armor op? dont make me laugh

Damage (AD and AP) and Defense are different components, Health and health regen aren't as different. I'm not saying AP and Armor would be OP, just that it has a greater capacity towards influencing multiple components of the game rather than just one, which again is why you don't see any items with Attack Damage and Magic Resist either.

This is certainly not discounting the possiblity of these items in the future, just a general idea of why they might not be around yet.