Hello Guy's
Some time many of us faces difficultly in searching record from dynamic data list in Liferay 6.2, so for your help below I am mentioning how you can do this-

Here I have created two methods for search record from dynamic data list in liferay 6.2.

ddlRecordnew.get(i).getField("firstName").getValue()
Here :
"ddlRecordnew" is instance of List<DDLRecord> and "firstName" is field name of data list in dynamic data list.
So now :
ddlRecordnew.get(i).getField("FieldName").getValue()
Following method print the matched record from searchString to database.

    public void SearchDdlRecord(String searchString){

        List<DDLRecord> ddlRecordnew = null;
            try {
    ddlRecordnew = DDLRecordLocalServiceUtil.getDDLRecords(-1, Integer.MAX_VALUE);

    if (ddlRecordnew != null) {

  StringTokenizer strPermit = null;
  String ptype = null;

  for (int i = 0; i < ddlRecordnew.size(); i++) {
        if (isRecordMatchingSearchCriteria(searchString, ddlRecordnew.get(i)) ) {
  strPermit = new StringTokenizer(String.valueOf(ddlRecordnew.get(i).getField("permitType").getValue()),"[]\"");
        while (strPermit.hasMoreTokens()) {
            ptype = strPermit.nextToken().trim();                           
        }
  System.out.println(ddlRecordnew.get(i).getRecordId()+"   "+ddlRecordnew.get(i).getField("firstName").getValue()+"    "+ddlRecordnew.get(i).getField("lastName").getValue());

    }        
    }
    }
    }
    catch (Exception e)
               {
                e.printStackTrace();

            }
        }

Following method match the searchString to database record and return boolean .

public boolean isRecordMatchingSearchCriteria(String searchString,
            DDLRecord ddlRecord) {
        try {

            if (searchString == null || searchString.length() < 0
                    || searchString.equals(""))
                return true;
            searchString = searchString.toUpperCase();

            String searchStringArr[] = searchString.split(" ");


            for (int i = 0; i < searchStringArr.length; i++) {
                String recordId = ddlRecord.getRecordId() + "";
                if (recordId.contains(searchStringArr[i]))
                    return true;



                if (ddlRecord.getField("firstName").getValue().toString()
                        .toUpperCase().contains(searchStringArr[i]))
                    return true;
                if (ddlRecord.getField("lastName").getValue().toString()
                        .toUpperCase().contains(searchStringArr[i]))
                    return true;
                if (new DateBefore()
                        .UIdateFormats(
                                (ddlRecord.getCreateDate().toGMTString())
                                        .toString()).toUpperCase()
                        .contains(searchStringArr[i]))
                    return true;
                if (ddlRecord.getField("phoneNumber").getValue().toString()
                        .toUpperCase().contains(searchStringArr[i]))
                    return true;
                if (ddlRecord.getField("Email").getValue().toString()
                        .toUpperCase().contains(searchStringArr[i]))
                    return true;
                if (ddlRecord.getField("permitType").getValue().toString()
                        .toUpperCase().contains(searchStringArr[i]))
                    return true;
                if (ddlRecord.getField("address").getValue().toString()
                        .toUpperCase().contains(searchStringArr[i]))
                    return true;
                if (ddlRecord.getField("describeBusiness").getValue()
                        .toString().toUpperCase().contains(searchStringArr[i]))
                    return true;

            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

That's it! Thank you :)