Can you provide any link that says the Clintons could not find anything on Obama? Or is this supposition?
More to the matter is the Clintons are just as bought and paid for as Obama and they do not dare buck the system they aligned themselves with. Those who paid for their enslavement would ruin them. Soros and moveon.org, mediamatters, dailykos, factcheck.org would have them out of the country in shame so quick their heads would roll.
As for a link to the Clinton's findings, you should direct your questions to Joann37. She is the one that contends nothing has been found. I contend that Berg is working under their direction.