Perhaps you should try some spelling variations:
international communication » interpersonal communication, international cooperation, intercultural communication
communication mitigation » communication motivation, communication mitigating, communication situation
mitigation decision » optimization decision
fixed points » fixed point
fixed linear » mixed linear, fixed line, fixed links

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

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