To quickly show a conversation or room title with specific words in the title, you can use the filter in the panel on the left of Teamwork Chat:

Just type what you'd like to search for, and you'll see the matching conversations show up automatically in the list below:

You can select each one to view it in the messages area and if you'd like to go back to the full list, you can cancel the filter using the 'x' or by switching to a different tab. 

You can use the filter in the 'timeline' tab, the 'rooms' tab or the 'direct conversation' tab.