Hi,
Ok, well if you want to use native Lucene queries, you need to use those that match the type of your field. If you’re using QueryParser, then my previous link is relevant: .fromLuceneQuery(…) not matching @GenericField fields - #2 by yrodiere . See solution #3 in particular.
Also, no, there isn’t any text representation of Hibernate Search predicates at the moment. You’ll have to use your own. There are plans to add support for QueryParser syntax (HSEARCH-4563), but as I already mentioned elsewhere, I’m already busy with other features, so you’ll have to wait or contribute a pull request if you want it soon.