Perhaps you should try some spelling variations:
international basics » international basic, international basis, international plastics
basics extensions » basins extension, basic extension, based extensions
array imaging » arrays imaging, airway imaging, ray imaging
array string » array strong, arrays strings, array sharing
competition » composition

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

• Performing a fuzzy search may retrieve terms with similar spellings: competition international basics extensions ((array imaging) or (array string))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: competition international basics extensions ((array imaging) OR (array string)).
• Adding a wildcard symbol may retrieve word variants: competition international basics extensions ((array imaging) or (array string))*.