$re = '/[0-9]{13}\\\\x11([\s가-힣a-zA-Z0-9]{2,})\(/m';
$str = '
8604286280013\\x11TRAN THI KIM THUY(44000(\\x030.1(53575\\x015\\t507030360)(주)에이플러스에셋어드바이저\\x0201\\x010\\x0200\\x0710MS350\\x0bGA3-5지점\\x0820210331\\x12314004468202103317\\x0231\\x010\\x0820210331\\n
[0-9]{13}([\\s가-힣a-zA-Z]{2,})\\(
[0-9]{13}\\\\x11[\\s가-힣a-zA-Z]{3,}\\(
[0-9]{13}\\\\([\\s가-힣a-zA-Z0-9]{3,})\\(';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php