Need help with xpdo condition groups

SELECT * FROM modx_site_tmplvar_contentvalues where tmplvarid = '8' and (value = '6' or value = '12')

$c->where(array(
    'tmplvarid' => '8'
));
      
$c->andCondition(array(
    'value' => '6'
), null, 1);
      
$c->orCondition(array(
    'value' => '9'
), null, 1);

SELECT * FROM mosega.modx_site_tmplvar_contentvalues where tmplvarid = '8' and (value = '18' or value = '12') or tmplvarid = '9' and (value like '%Action%' or value like '%komödie%') or tmplvarid = '58' and (value = 'P') order by contentid asc

if($_GET['u'] != ''){
    //USK Conditions
    
    $c = $modx->newQuery('modTemplateVarResource');
    $c->select('*'); 
    
    if(count($uskValues) == 1){
    
      $c->where(array(
          'tmplvarid' => '8',
          'value' => $uskValues[0]
        ));
      
    }else{
      
      $c->where(array(
          'tmplvarid' => '8'
        ));
      
      $c->andCondition(array(
          'value' => $uskValues[0]
        ), null, 1);
      
      unset($uskValues[0]);
      
      foreach($uskValues as $usk){
        $c->orCondition(array(
          'value' => $usk
        ), null, 1);
      }
    }
    $elements = $modx->getCollection('modTemplateVarResource',$c);
    $uskids = array();  
    foreach($elements as $element){    
      $uskids[] = $element->get('contentid');
    }
  }

$c = $modx->newQuery('modTemplateVarResource');
$c->select('*');
$c->where(array(
  'tmplvarid' => '8',
  array(
    'value' => '6',
    'OR:value' => '12
  )
));

$c->select('*');

$c->select($modx->getSelectColumns('modTemplateVarResource','modTemplateVarResource'));

<?php
$c->where(array(
    'tmplvarid' => '8',
    'value:IN' => array('6','12')
));

<?php
$c->where(array(
    'tmplvarid' => '8',
    array(
        'value' => '6',
        'OR:value:=' => '12'
    )
));

<?php
$c->where(array(
    'tmplvarid' => '8',
    'value:IN' => $uskValues
));

<?php
$c->where(array(
    'tmplvarid' => '8',
    'value:IN' => explode($uskValues)
));