I wanna download two albums that I already bought. When I search them itunes store on both my iphone and pc they show ap as purchased but I can't download them.

What you can redownload for free (music can't be redownloaded in all countries) will show under the Purchased link under Quicklinks on the right-hand side of the iTunes store homepage on your computer's iTunes, and the Purchased tab in the iTunes store app on your phone. If music shows there, but not those two albums, then chck to see if they are hidden from the Purhcased links : http://support.apple.com/kb/HT4919