Jquery 在shiny 的datatable列中启用智能搜索

I have implemented the following shiny table, where users can filter the whole table or specific columns. However, while the smart search works for the search of the whole table, I can't enable the smart search for the columns. Could someone please give me a hint what I can do to enable smart search also for the columns? Thank you in advance.

output$shiny_table =
   DT::renderDT({

     # Show the filtered data table
     DT::datatable(

        # Call the filtered table as function
        data = table_filtered(),

        # Load and include extension modules
        extensions = c("FixedHeader"),

        # Each column has its own search box
        filter = list(position = "top",
                      clear = TRUE,
                      plain = TRUE),

        # Further options
        options = list(

           # Mark found search terms
           searchHighlight = TRUE,
           search = list(smart = TRUE, regex = TRUE, caseInsensitive = TRUE),

           # Special column properties
           columnDefs = list(
           
              # For specific columns: enable smart search
              list(targets = c("Title", "Authors", "Journal"),
                   search = list(smart = TRUE, regex = TRUE, caseInsensitive = TRUE)),

              # For specific columns: hide the search fields
              list(targets = c(" ", "Year", "Type", "Citations", "DOI"),
                   searchable = FALSE)
           )
        )
     )

   }, server = TRUE)