only debts that exist on the day the petition is filed are discharged in bankruptcy, so if the debotr incurs new debt while the bankruptcy is pending or after discharge, the new debt isn't part of the discharge.
credit card companies are delighted to give new cards right after a bankruptcy, because the debtor cannot declare bankruptcy again for a specified time period -- so they know that if the person is employed, they can garnish wages if they have to.
in bankruptcy, certain property may be exempt -- it can't be used to satisfy creditors. example, the debtor's house. if I'm not mistaken, the debtor could file for bankruptcy, preserve his house and obtain a discharge, then use the house as collateral for a bank loan.