How to combine my two steam account into one?

I have counter strike and dota2 in two different steam account..Is it possible to get the dota 2 into my counter strike steam account?

Solution 1:

I have tried doing this back in December 2007 and at the time it was not possible, I don't know if they have changed stance on this but I doubt it.

I got the following answer from Steam Support when asking to merge account or move games from one to the other:

Thank you for contacting Steam Support.

Per the Steam Subscriber Agreement, Steam game subscriptions / CD keys are nontransferable and cannot be reset / moved between Steam accounts.

I am sorry, will be unable to assist you with this issue.