You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'tags) order by stt,id desc limit 0,15' at line 1
Syntax error: select id, ten_vi as ten, tenkhongdau, thumb, price, oldPrice, check_best_seller from table_product where hienthi=1 and FIND_IN_SET(,tags) order by stt,id desc limit 0,15