In order to search images/users in wall post:
When you log into your wall post, you can see your home page.
Here just between the Wall post title and the home tab you can see an option for search like.
In this area enter the users you want to search and click on the magnifying glass symbol here.
You can now find your search.
In order to search for images, click on the small inverted triangle beside users. It will show a drop down.
Here you can select images like.
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