Perhaps you should try some spelling variations:
international convention » international cooperation, international context, international communication
convention basics » convection basic, conversion basic, conversations basics
basics dimensions » basic dimensions, physics dimensions, based dimensions
dimensions a » dimensions _
a libre » _ libre, de libre

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• Performing a fuzzy search may retrieve terms with similar spellings: international convention basics dimensions a libre~.
• Adding a wildcard symbol may retrieve word variants: international convention basics dimensions a libre*.