Thumbnail to become visible on every post

I try that few post thumbnail to become visible on every post. But can not find CSS code that works.

.uposts-part.thumbnail {
display: block;
max-width: 1080px;
width: 100% !important;
height: auto !important;
max-height:380px;
padding: 0px;
margin: -60px 7px 2px 0;
overflow:hidden;
}

http://haugesundmisjonskirke.no/jul-med-voice-of-joy-og-egil-svartdahl/#