Perhaps you should try some spelling variations:
communications convention » communications connections, communication conversation, communications companion
communication connection » communications connections, communication connecting, communication collections
expansion diseases » expansion disorders
diseases selected » diseases collected
based expansion » based extension, basis expansion, based explanation

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((communication connection) or (communications convention)) based expansion diseases selected~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((communication connection) OR (communications convention)) based expansion diseases selected.
• Adding a wildcard symbol may retrieve word variants: ((communication connection) or (communications convention)) based expansion diseases selected*.