You can collect from your maps topics that contain the text you want.
For this, there are macro language operators topicname and topictext.
For example, to collect topics containing text "meeting", create topic "Meetings", and in it's notes write the code: topictext:contains
Data collection engine now understands that you want to collect topics that contain the word "meeting" in their text.
You can search for topic text more flexibly - see details in the data collecion Macro Language.
The case of letters by default doesn't matter. But if you want it to be case sensitive, apply macrolanguage operator "casesensitive".