[Tu Tran]

Hi,

The links below may related with your issue. Please try to follow these.
http://magento.stackexchange.com/questions/44540/magento-1-9-paypal-checkout-is-stuck-at-terms-and-condition
http://stackoverflow.com/questions/12840022/magento-paypal-please-agree-to-all-the-terms-and-conditions-before-placing-t

Thanks,