Hi @lea-clear-clover
The data services documentation talks about removing special characters from the Full Text Search per default (see here). This might be why the two separate parts work but not the whole as “AB0001” != “AB/0001”
There’s also another thread here, https://discourse.geta12.com/t/approximate-search-a-special-character/2239 which talks about a different special character and the solution.
Does this point you in the right direction?