We recently released a new version of our Topic Tagging API! You can now generate multi-word hashtags or keywords for your blog.
The previous version finds the common associations between keywords extracted from the text. Those most highly occurring common associations become our topics.
In the new version, we added an additional algorithm on top of that. It looks for repeated pairs of words and if found, matches them with the list of single word topics found from our previous version. The matches become our new multi-word topics.
Take a look at the Topic Tagging API demo.
If you have any questions, please feel free to contact our development team!