Is there any possible way to search test cases in Zephyr by text from test steps? Now it looks like search occurs only in description, summary or specific field.
With the native functionality of zephyr, it is not possible to search tests based on the words/expressions of "Test details". Test steps details correspond to the zephyr custom field zephyr test step. So, these fields cannot be searched using JQL or ZQL. For the supported fields and operators of ZQL use the following link: https://zephyrdocs.atlassian.net/wiki/display/ZTD/ZQL+Reference