You can apply several filters to the list of topics on the Topic screen to show only specific topics.
Note: You must have the Filter Topic permission to filter topics.To apply a filter to the topic list:
- From the From the Topics screen, click on the Filters menu. A list of filters appears.
- Click on the radio button next to the the filter(s) you want to apply to the topic list.
Note: If you pick options under “Any of these,” then the filter will display topics that meet any of your selections. If you pick options under “All of these,” then the filter will display only topics that meet all of your selections combined.
- Click on Apply selected filters. A list of topics assigned to you is displayed.
Note: Select Clear all filters (display all topics) from the filters list to return to the complete list of topics in the topic list.
Reference: Google Groups Help - Filter topics on the Topics screen