document clustering dataset

Please i need a dataset for document clustering that contains keywords


please i want it in a csv format

Have a look at 20 newsgroups, e.g.

You can convert it to the desired format on your own, that's what KNIME is for.

how to convert it please?

There is no ready-to-use method, you'll have to create your own workflow for that. Probably have a look at the following nodes as a starter: List Files to get the directory content of the dataset and Document Parser to read the text files to a table cell.