Perhaps you should try some spelling variations:
northern frontier » southern frontier, northern counties, western frontier
another frontier » other frontier, another brother, another fourier
other frontiers » other frontier, kohler frontiers, our frontiers

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %((other frontiers) OR (((another frontier) OR (northern frontier)))) section%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((other frontiers) or (((another frontier) OR (northern frontier)))) section%22".
• Adding a wildcard symbol may retrieve word variants: %((other frontiers) or (((another frontier) OR (northern frontier)))) section%22*.