Hi Judy. At the bottom of the main WikiTree Search page, available in the Find menu or at
https://www.wikitree.com/wiki/Special:SearchPerson
is a section "Search for Any Text". You can select the radio button for Free-Space Profiles, enter a search term, and click Go. This will search over all free-space pages created by anyone, not just you.
Edited to add: Unfortunately it doesn't find "Buena Vista Plantation"! Apparently Google indexing of our space pages is incomplete. An internal WikiTree search like the one successfully developed for Help pages might be worthwhile.