Takes a bit of work, but it works well after you do some configuration. Thank you! If I can post a couple examples for your Searches folder, the two that I use most often:
https://www.startpage.com/do/dsearch?query=%s
http://www.imdb.com/find?s=all&q=%s
The %s is the wildcard that is replaced with whatever you have selected on the page you are searching.
