Perhaps you should try some spelling variations:
"erde canal commission" » "erde royal commission", "erde a commission", "de canal commission"
"erde central commission" » "verde central commission", "emde central commission", "trade central commission"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"erde canal commission\") OR (\"erde central commission\"))".
• Removing quotes may allow a broader search: (( erde canal commission ) OR ( erde central commission )).
• Adding a wildcard symbol may retrieve word variants: (("erde canal commission") OR ("erde central commission"))*.