Perhaps you should try some spelling variations:
urban transport » road transport
demand case » demand fase, demand based, demand age
luis c1 » luis c
c1 heat » 1 heat, 11 wheat, pcm heat
3 urban » 2 urban, 4 urban, 1 urban
4 cash » _ cash, a cash, 5 cash
luis 3 » luis f, luis c, luis a

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: (( luis c1 heat transfer ((4 cash) OR (4 case)) ) OR ( luis 3 urban transport demand case ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( luis c1 heat transfer ((4 cash) OR (4 case)) ) or ( luis 3 urban transport demand case ))~".
• Adding a wildcard symbol may retrieve word variants: (( luis c1 heat transfer ((4 cash) OR (4 case)) ) or ( luis 3 urban transport demand case ))*.