How to search a text placed in description of charges

I’m using search (search all) api to search for post code placed in description of Charges. Not getting desired result. I see most of the search results matching either title or address only not charges.

I don’t think you can search charges or text within them. The documentation lists what search endpoints there are - company, officer, disqualified officer and all (searches those three together):

https://developer-specs.company-information.service.gov.uk/companies-house-public-data-api/reference

Also for (some) explanation of how the search works see the announcement (2016!) of the current search facility:
https://forum.aws.chdev.org/t/search-enhancements-change-notice/682

… and also a quick overview of search:
https://forum.aws.chdev.org/t/for-search-companies-query-what-does-it-search-and-how/1007/2

Thank you . Is their any commercial product available for the same ?