SharePoint online JavaScript problem finding a given SharePoint group

Below is my code:

var clientContext = SP.ClientContext.get_current();
// Fetch all groups because I can't just grab those for this subsite.
    this.collGroup = clientContext.get_web().get_siteGroups();
    var SvcUnit = 'AJM';
        
    clientContext.load(collGroup);
    clientContext.load(collGroup, 'Include(Users)');
    collGroup = clientContext.get_web().get_siteGroups();

    clientContext.load(collGroup);
    clientContext.load(collGroup, 'Include(Users)');
    clientContext.executeQueryAsync(Function.createDelegate(this, function() { 
         
         var groupsInfo = '';  
            var groupsEnumerator = collGroup.getEnumerator();          
           
             while (groupsEnumerator.moveNext()) {  
             var oGroup = groupsEnumerator.get_current(); 
               // alert(oGroup.get_title()); 
               if (oGroup.get_title().indexOf('Front Office') != -1) {
                    var mygrpsvcunit = (oGroup.get_title());
                 
                    if (oGroup.get_title().indexOf(SvcUnit) != -1) {
                        
                       // alert(oGroup.get_title());
                      
                      FrontOfficeGrpId = oGroup.get_id();
                       FrontOfficeGroupName = oGroup.get_title();
                      // alert(FrontOfficeGrpId);
                     //  alert(oGroup.get_title());
                    // alert('Front office group is: '); 
                  //  alert(FrontOfficeGroupName);
                     //  alert(FrontOfficeGrpId);
                     timeout(5000).then(function() {
                      retrieveAllUsersInFrontOffice(FrontOfficeGrpId);
                        });    
                 }

The problem is, in my SharePoint site I do have a permission group whose name consists of AJM and Front Office. However, I am not able to retrieve it vis indexOf. 

Any idea if I can use another method of finding it? I can find other groups using IndexOf method only not this one.

Thanks

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faye fouladi