Perhaps you should try some spelling variations:
international security » national security
information sources » information resources, information services
information science » information society, information services
infomation series » information services, information security

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((((international security) or (((infomation series) or (information sources))))) or (information science))s -- ) OR ( ((((international security) or (((infomation series) or (information sources))))) or (information science)) -- ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((((international security) OR (((infomation series) OR (information sources))))) OR (information science))s -- ) OR ( ((((international security) OR (((infomation series) OR (information sources))))) OR (information science)) -- ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((((international security) or (((infomation series) or (information sources))))) or (information science))s -- ) OR ( ((((international security) or (((infomation series) or (information sources))))) or (information science)) -- ))*".