custom search within wordpress

Hello,

I am a wordpress newbie and am having trouble with a recent assignment.

My project is at https://myphpdevelopers.com/abgtours and have to figure out a way to search posts of a custom type -tours using 2 custom taxonomies -‘tourscat’ and ‘tourstype’. The top menu of this site is based on tourscat and footer menu is based on tourstype. The url of the search page is https://www.myphpdevelopers.com/abgtours/advanced-search/

I am not able to get the advanced search to work. As you can see the left part of search page has tourscat options and the right column has tourstype options. the code is as at https://pastebin.com/BiV4kZsC

Please help! Thanks!