Perhaps you should try some spelling variations:
international convention » international cooperation, international context, international communication
convention mass » convection mass, convention mastec, convention james
mass dimensions » class dimensions, basic dimensions, based dimensions
wave guide » wave guides
age guide » page guide, image guide, care guide

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 mass dimensions ((age guide) or (wave guide))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: international convention mass dimensions ((age guide) OR (wave guide)).
• Adding a wildcard symbol may retrieve word variants: international convention mass dimensions ((age guide) or (wave guide))*.