Each Group offers a search box to search exclusively for contents within this Group.
You will find this box on the Group's Home page:

Enter what you're searching for and select the tiny loop icon or press the Enter key on your keyboard. Corresponding search results will display.
When searching within a Group, you can use any if the search tips explained here, as well as those mentioned on the search page.
When searching within a Group, you can use any if the search tips explained here, as well as those mentioned on the search page.
[+] I am searching for a specific content type
If you are searching for a specific content, you can use search boxes available in the filter options of the Group's Library (for all documents), Discussion, Media (for all images, photos and photo-albums) and Event sections.
[+] Additional search filters in Groups
Groups sometimes have their own terminology: either defined by the Group's administrator(s) as custom categories, or as free tags entered by Group Members themselves. You can refine search results or lists of content by clicking on either of these extra tags.
[+] Clicking tag links to access more content tagged with the same term
When viewing content within a group, you will find tags displayed in blue that can be clicked. By selecting one of these terms, you will find all the contents in this Group that share the same tag.
For example, if you select a Language tag 'français', you will generate a list of all contents within the group that is also tagged with the language tag 'français'.