Perhaps you should try some spelling variations:
communication estimation » communication mitigation, communication optimization, communication negotiation
communication motivation » communication foundation, communication satisfaction, communication implications
connections problems » connections problem, connection problem, conditions problems
methods connections » methods connecting, methods foundations, methods conclusions
problems like » problems life, problems liver, problems list

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((communication estimation) or (communication motivation)) methods connections problems like~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((communication estimation) OR (communication motivation)) methods connections problems like.
• Adding a wildcard symbol may retrieve word variants: ((communication estimation) or (communication motivation)) methods connections problems like*.