I'm not sure. I'd love for there to be a way to perform a find an selectively add the word to the "selections", but I don't think there is such an option yet.
However, this might help you: try selecting the phrase you want, then hitting ctrl+d (select word).
What ctrl+d does is select the current word, but after that, it will select that next word, then the next, all the while making them selected as well. It's a quick and easy way to make multiple selections.
The best part is, you can select more than a word, then hit ctrl+d, and it will select that (this can include several lines, if you want).