Perhaps you should try some spelling variations:
frontiers collection » frontiers selection, containers collection, reuters collection
containers creation » containers creating, container creating, containers section
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 (containers creation))) OR (folders collection))) OR (frontiers section))%22.
• Adding a wildcard symbol may retrieve word variants: %22the ((((((frontiers collection) or (containers creation))) or (folders collection))) or (frontiers section))%22*.