How to Group Data / Visualise

Hello. 

I have a survery that users fill in. In one of the questions, they are given the option of free text box where they can express their views on the given topic. E.g Why are you not satified with your working arrangements?

Users populate the form with lots of text expressing views such as, complaints about management, not being able to work from home, tea and coffee machine broken, issues in the office, etc - the responses are varied and users can type upto 2000 characters. 

I need a way to group this or find a way to easily report on this response. 

I tried using Text Analyics feature in Power BI Desktop to extract Key Words - but its failing to extract the key words which i think are key. 

What is the best way to report on this data. I was thinking if it was possible to group this data in buckets - so can we automate a way to say "this response is refering to working from home, so tag it as working from home", or this response is issues with management, so tag it under 'management issues' tag. 

Then i can just report on the tags.  Is this possible, if so, what is the best way to acheive this. 

hope that made sense. 

Any help will be beneficial. 

Thanks