Based on your feedback we've updated the filters on our Search Terms report to include a new "search term" filter option. The new search term filter makes it faster and easier to find groups of terms that may be of particular interest to you. For example, if you run a flower delivery website, you may be interested in seeing all search terms containing the word "valentines" in the weeks leading up to February 14th. You could then add all or some of those terms as new keywords to your "valentines" ad group.
Here is a screen shot of the new filter:
Forum discussion at Google+.