stmt准备和执行语句之后的php获取结果

I am trying to do an search query in SQL, using AJAX to change a div tag into the result of the search. However, I have not been able to get the query running with stmt binding params (for security). By printing variable I found that all parts is working, but I think either the params are not searching properly, or the get_result is used incorrectly. The reason I say that is, when printing in the while loop, the output is always "()". By the way, the table that it is pulling from has more than 20 columnsI am trying to do an search query in SQL, using