Perhaps you should try some spelling variations:
international friction » international aviation, international action, international edition
international african » international africa, international american, international afghan
friction economy » fiction economy, aviation economy, production economy
african economy » african economic, american economy, african economies
economy series » economics series

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: (( international african economy series ) OR ( international friction economy series ))~.
• Adding a wildcard symbol may retrieve word variants: (( international african economy series ) or ( international friction economy series ))*.