Perhaps you should try some spelling variations:
"Encyclopédie industrielle und commerciale" » "Encyclopédie industrial un commerciale", "Encyclopédie industrielles et commerciale", "Encyclopédie industrial una commerciale"
"Encyclopédie industrielle und commercialize" » "Encyclopédie industrial un commercialize", "Encyclopédie industrielles et commercialize", "Encyclopédie industrial una commercialize", "Encyclopédie industrielle und comercializan", "Encyclopédie industrielle und comercializar"
"Encyclopédie industrielles _ commercial" » "Encyclopédie industriales _ commercial", "Encyclopédie industries _ commercial"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("Encyclopédie industrielle und commerciale") OR ("Encyclopédie industrielles _ commercial"))) OR ("Encyclopédie industrielle und commercialize"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Encyclopédie industrielle und commerciale\") OR (\"Encyclopédie industrielles _ commercial\"))) OR (\"Encyclopédie industrielle und commercialize\"))".
• Removing quotes may allow a broader search: (((( Encyclopédie industrielle und commerciale ) OR ( Encyclopédie industrielles _ commercial ))) OR ( Encyclopédie industrielle und commercialize )).
• Adding a wildcard symbol may retrieve word variants: (((("Encyclopédie industrielle und commerciale") OR ("Encyclopédie industrielles _ commercial"))) OR ("Encyclopédie industrielle und commercialize"))*.