Perhaps you should try some spelling variations:
communication collections » communication applications, communication cohesion, communication foundations
collections nonbook » collections non
nonbook extraction » network extraction, non extraction
recursion removal » occlusion removal, region removal
turion removal » iron removal, boron removal, ion removal

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication collections nonbook extraction ((recursion removal) or (turion removal))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication collections nonbook extraction ((recursion removal) OR (turion removal)).
• Adding a wildcard symbol may retrieve word variants: communication collections nonbook extraction ((recursion removal) or (turion removal))*.