'contents contain' with .numbers files

Hi, so the question is more or less in the post subject: It seems like Hazel is not able to search the content of a .numbers table.
I do our office accounting with programmed .numbers files, and Hazel needs to read the .numbers content for a specific letter phrase. But the rule is not activated.
The numbers file/phrase is being found when searched with the finder search.
I tried contain and contain match.
Any tips?
I do our office accounting with programmed .numbers files, and Hazel needs to read the .numbers content for a specific letter phrase. But the rule is not activated.
The numbers file/phrase is being found when searched with the finder search.
I tried contain and contain match.
Any tips?