Thanks for your reply.
I'm sorry, I should have been clearer. From my Legacy software, I click on Internet - Search the internet for current person using Ancestry.com. It automatically searches all collections for the person I have on my screen. I edit the search to include born date, death date spouse name, etc., whatever I know. I click search again and get tons of suggestions. I go through them one at a time until I find my man/woman in a collection, for example, 1920 US Census. At that point I would like to eliminate 1920 Census collection from all suggestions. If this is already a feature that can be done, I don't see how.