Documents shown on documentdownload link

Hi All, 

    i have written a work for export to excel and with download functionality, 

   in download document link , all the document in an array is show, how can i show documents with specific keyword in document name,

    like , if the array has 10 documents, i want to show documents link which names contains ABCD,

   i have attached the code, please help.

a!localVariables(
  local!test : null,
  local!EligiblePoolProcessInfo,
  local!EligiblePoolExportedData,
  local!errorMessage,
  /* Fetch documents respective to program ids*/
  local!eligiblePoolDocs:  a!refreshVariable(
    value:finddocumentsbyname(
      searchAllContent:true,
      documentNameToSearchFor:ri!programId&"_"&text(now(), "DDMMYYYY")
    ),
    refreshAlways: true
  ),
  local!eligiblePoolDocDeriveNames: 
  a!refreshVariable(
    value:if(rule!APN_isBlank(local!eligiblePoolDocs),{},
    tointeger(stripwith(stripwith(touniformstring(local!eligiblePoolDocs),"[Document:"),"]"))),
    refreshAlways: true
  ),
  local!eligiblePoolDocNames:  
  a!refreshVariable(
    value:if(rule!APN_isBlank(local!eligiblePoolDocDeriveNames),{},
    substitute(
      a!forEach(
        items: local!eligiblePoolDocDeriveNames,
        expression: document(fv!item,"name")),ri!programID,"EP")
    ),
    refreshAlways: true
  ),
  {
      a!linkField(
        labelPosition: "COLLAPSED",
        links:a!dynamicLink(
          label:"Export to Excel",
          saveInto: {
            a!startProcess(
              processModel:cons!CMP_EXP_EligiblePoolPM,
              processParameters: {
                groupType : ri!groupType,
                progarmId : ri!programId,
                clsSbg: ri!sbg
              },
              onSuccess: {
                a!save(local!EligiblePoolProcessInfo,fv!processInfo),
                a!save(
                  local!EligiblePoolExportedData,
                  index(
                    local!EligiblePoolProcessInfo.pv,
                    "output_document",
                    {}
                  )
                )
              },
              onError: a!save(
                local!errorMessage,
                "Error Exporting File to Excel"
              )
            )
          }
        ),
        showWhen: and(isnull(local!EligiblePoolExportedData),
        ),
        align: "RIGHT"
      ),
      /*a!linkField(*/
        /*showWhen: not(isnull(local!EligiblePoolExportedData)),*/
        /*align: "RIGHT",*/
        /*links: */
        /*{*/
          /*a!documentDownloadLink(*/
            /*label: "Download Excel File",*/
            /*document: local!EligiblePoolExportedData*/
          /*)*/
/*    */
        /*}*/
      /*)*/
      a!richTextDisplayField(
        align: "RIGHT",
        value: a!richTextItem(
          text: "*Document will be available shortly after clicking.",
          style: "EMPHASIS",
          color: "SECONDARY",
          /*showWhen: not(local!IsProcessCompleted)*/
        )
      ),
      a!richTextDisplayField(
        align: "RIGHT",
        value: a!forEach(
          items: local!eligiblePoolDocNames,
          expression:  a!richTextItem(
            text:fv!item&"  ",
            link:  a!documentDownloadLink(

              document: index(local!eligiblePoolDocs,fv!index,fv!index)
            )

          )
        ),
      )
  }
)

   Thanks in advance