Follow-up to reply => https://community.logos.com/forums/p/160598/960423.aspx#960423 that feels a bit buggy since a search of Heading and Large text does not find English headword phrase.

New Dictionary of Theology has three text search fields: Footnote, Large, and Surface.
Searching surface text for English headword phrase finds phrase while searching Large Text does not (shown in screen shot).
Being able to search headword(s) would be appreciated. Perhaps indexing algorithm for Heading OR Large text could be modified to include Headword text. Another thought is exposing Headword indexing as a text search field.
Keep Smiling [:)]