This is not necessary, because the same issue happens on your theme demo site, at this url: http://janstudio.net/helpdesk/
You may test it as follows:
1. Go to http://janstudio.net/helpdesk/
2. Click “Forums” to go to http://janstudio.net/helpdesk/forums/
3. In the search box, type “avada”
4. Note results
5. Go back to home page at http://janstudio.net/helpdesk/
6. In the search box, type “avada”
7. Note results — they are DIFFERENT. The homepage search does NOT include the forum results.