Talvez debería tentar con algunhas variantes ortográficas:
communication forms » communications forms, communication norms, communication format
methods clinical » methods critical, methods chemical
methods physical » methods chemical, methods practical
forms extension » forest extension, farm extension, force extension

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

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