you can insert any link you want with any word or sentence you want:
1st - - make a select on the word or sentence you want insert a link on it : look at photo below..
2nd - - right click on the selected word or sentence or click on the tool in the top right of the other photo
3rd - -You can put any link you want that belongs, express or lead to the subject you're writing about.
4th - - you can target the selected word to open in a new window to don't loose the blog page
5th- - the selected word gonna be like this with purple color : look at the photo below :