"Football" or Soccer is the most watched, most played and most popular sport in the world. Anytime you use the word Football, the search engines will lead you to Football (Soccer). Try typing in "American Football" as the sport using the oval, hand thrown, run ball should probably just be called "Gridiron" to save confusion.
You can also narrow your search by using the terms NFL, or NCAA, or Arena, to describe the particular form of US football you are searching.
How Soccer Explains the World has 272 pages.
Soccer Comes First has 157 pages.
In Search of My Father has 221 pages.
In Search of Wonder has 180 pages.
The Search for WondLa has 496 pages.
Jedi Search has 384 pages.
Acorna's Search has 304 pages.
The Search for Roots has 234 pages.
The Football Factory - novel - has 256 pages.
Football Dreams - novel - has 314 pages.
There are 272 pages.
In Search of a Distant Voice has 183 pages.