Perhaps you should try some spelling variations:
communication conversation » communication information, communication cohesion, communication communication
conversation based » conversion based, conversation basic, conversation made
based extension » based extraction
extension using » extension united
using species » using special, using specific, single species

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication conversation based extension using species~.
• Adding a wildcard symbol may retrieve word variants: communication conversation based extension using species*.