from my experience with redemption on AA using Asiamiles, you should go to aa.com and use their reward booking system (click on the AAdvantage redeem miles box) to check if there are award flights available.

usually what i find is that if it's available on the aa.com website, then you can get it with Asiamiles. obviously, if it's not available for AAdvantage members , then you won't be able to get it either.