I prefer using the very Google engine over a target site, to using local engines. Why not use the most powerful search engine? But, your choice.
Try searching this site with the Google engine:
1. Go to
https://www.google.com
2. Define a parameterized search with "site" as a parameter defining the site over which the Google engine searches, e.g. for the terms "balance" and "levodopa" (say you are trying to find articles dealing with the effectiveness of levodopa in balance issues) by filling this in the search box
site😛arkinsonsdisease.net balance levodopa
3. Click on the
Google Search
button
and you'll get a list of results. Voila:-]