Search for stories in News on iPod touch
The News app 
keeps track of a wide variety of channels, topics, and stories, which makes it easy to find content that interests you.
Search for channels, topics, or stories
Tap Following, then tap the search field.
Enter any of the following:
The name of a channel, such as CNN or Washington Post
A topic, such as fashion, business, or politics
A story, such as the rescue of a baby elephant
In the results list, tap 
to follow the channel or topic.