Search tools
From Bahai9
Use the Search Bar (or Special:Search) to search through this wiki site (see also Bahai9:Searching).
Search through the Writings (customize exactly what books to search through and be able to use wildcards): https://reference.bahai.org/en/search.html
Search the Bahá'í Library Online here: https://bahai-library.com/
Here is an older article on the topic of searching: https://bahai-library.com/start/search_engines.html