Perhaps you should try some spelling variations:
international convention » international cooperation, international context, international communication
convention based » contention based, conversion based, conversation based
based extraction » based interaction, phase extraction, based education
array paving » array planning, array imaging, array probing
array arcing » array forming, array probing, array sharing
arrays ang » arrays a

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

• Performing a fuzzy search may retrieve terms with similar spellings: international convention based extraction ((((array paving) or (array arcing))) or (arrays ang))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: international convention based extraction ((((array paving) OR (array arcing))) OR (arrays ang)).
• Adding a wildcard symbol may retrieve word variants: international convention based extraction ((((array paving) or (array arcing))) or (arrays ang))*.