Where to find more detailed data for International Comparison Program 2011?
These data are not publicly available. According to Section VI of this PDF, the more detailed the data, the more restricted they are. 

For the less restricted data, there is ostensibly some painful application process that researchers can go through in order to get access. But in practice, unless you're a big shot or someone who has connections with the World Bank, they will be reluctant to share the data with you. (That was my personal experience — I went through the whole long application process, there was some back and forth for about a month, and eventually they decided not to share the data with me.)

And for the most heavily restricted data:


  Access to Sub-National Data and Individual Price Observations with supporting metadata is restricted in general. However, users may address applications of access to these data directly to the countries in question.