Perhaps you should try some spelling variations:
international communication » interpersonal communication, international cooperation, intercultural communication
central functions » control functions, mental functions, spectral functions
center functions » vector functions, tensor functions, filter functions
concept chris » concepts chris, concept car, concept card

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 ((center functions) OR (central functions)) concept chris~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "international communication ((center functions) OR (central functions)) concept chris".
• Adding a wildcard symbol may retrieve word variants: international communication ((center functions) OR (central functions)) concept chris*.