Perhaps you should try some spelling variations:
containers collection » containing collections, containers section, containers creation
frontiers collection » transfers collection, frontieres cooperation, frontiers conclusion
frontiers selection » frontier section, frontier electron, frontier reflections
reuters collection » reducers collection, reactors collection, users collection
folders collection » folders connections, holders collective, leaders collection
frontiers section » frontier section

Try widening your search to All Fields.

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: %22the ((((((((((frontiers collection) OR (frontiers section))) OR (reuters collection))) OR (containers collection))) OR (folders collection))) OR (frontiers selection))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22the ((((((((((frontiers collection) OR (frontiers section))) or (reuters collection))) or (containers collection))) or (folders collection))) or (frontiers selection))%22".
• Adding a wildcard symbol may retrieve word variants: %22the ((((((((((frontiers collection) OR (frontiers section))) or (reuters collection))) or (containers collection))) or (folders collection))) or (frontiers selection))%22*.