I wanted the portfolio item content shown under the image, so here what I've done, may be can be helpful for someone has the same need:
found line 52
echo avia_advanced_hr(false, 'hr_small'); and commented (not deleted, just for evetual rollback)
found line 54
the_content(__('Read more','avia_framework').'<span class="more-link-arrow"> →</span>'); and commented
moved what commented above after
echo "</div>"; echo "</div>";
Anything seems go right as I want now.