Perhaps you should try some spelling variations:
participation democratique » participacion democratica (Expand Search), participativas democraticas (Expand Search), participation politique (Expand Search)
"Usages de drogues _ participation démocratique" » "Usages de drogue _ participation démocratique" (Expand Search), "Usages de drogas _ participation démocratique" (Expand Search), "Usages de drones _ participation démocratique" (Expand Search)
"Usages de azogues _ participation démocratique" » "Usages de azotes _ participation démocratique" (Expand Search)
usages de » usage de (Expand Search), usages et (Expand Search), usage des (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("Usages de drogues _ participation démocratique") OR ("Usages de azogues _ participation démocratique"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Usages de drogues _ participation démocratique\") OR (\"Usages de azogues _ participation démocratique\"))".
• Removing quotes may allow a broader search: (( Usages de drogues _ participation démocratique ) OR ( Usages de azogues _ participation démocratique )).
• Adding a wildcard symbol may retrieve word variants: (("Usages de drogues _ participation démocratique") OR ("Usages de azogues _ participation démocratique"))*.