Please refer question 

We would like to have wild card searches on Confluence pages. If we have labels like 'OTB_First' and 'otb_Second' on two separate pages, currently, we can only search for pages with labels starting with 'OTB' using back-end query only. We are looking to searching them from a Confluence page search using wild-card search like %OTB% or something of that sort, via a CQL or a Macro

Please help with that feature