Perhaps you should try some spelling variations:
"materialises citizens" » "materialize citizens", "materialized citizens", "materials citizens", "materializes citizens", "materializeds citizens", "materialss citizens"
"materialises cities" » "materialize cities", "materialized cities", "materials cities", "materializes cities", "materializeds cities", "materialss cities"
"materialise citizens" » "materialize citizens", "materialized citizens", "materials citizens"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("materialises citizens") OR ("materialise citizens"))) OR ("materialises cities"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"materialises citizens\") OR (\"materialise citizens\"))) or (\"materialises cities\"))~".
• Removing quotes may allow a broader search: (((( materialises citizens ) OR ( materialise citizens ))) or ( materialises cities ))~.
• Adding a wildcard symbol may retrieve word variants: (((("materialises citizens") OR ("materialise citizens"))) or ("materialises cities"))*.