Perhaps you should try some spelling variations:
communication intervention » communication interaction, communication interpretation, communication international
communication introduction » communications introductory, communication information, communication satisfaction
methods dimensions » methods dimension, methods directions, metrics dimensions
dimensions models » dimensions model, dimensional models, dimension model
models fixed » models mixed, model fixed, models first

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

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