b) Solutions whose new results are disclosed but haven't however been regarded by any nations on the earth;B? qua B?t ??u xem h??ng d?n ??ng nh?p ?? xem h??ng d?n Quý khách ch?a ??ng nh?p, vui lòng ??ng nh?p ?? tr?i nghi?m nh?ng ti?n ích có phí.                                                 �