Nghia-vu-thanh-toan-doi-voi-su-kien-bat-kha-khang-su-kien-bat-kha-khang-tam-dung-nghia-vu-thanh-toan-do-su-kien-Bat-kha-khang-viec-khong-co-kha-nang-thuc-hien-cac-nghia-vu-khac-ngoai-nghia-vu-thanh-toan