Perhaps you should try some spelling variations:
transformation 20 » transformation 2, transformation 10, transformation 26
urban transport » road transport
transport fuel » transport fares
4 urban » 2 urban
e data » e datas, age data, cge data
luis 4 » louis 4, luis f, luis c

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( luis ((e data) OR (3 data)) transformation 20 cao ) or ( luis 4 urban transport fuel cacao ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( luis ((e data) OR (3 data)) transformation 20 cao ) OR ( luis 4 urban transport fuel cacao )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( luis ((e data) OR (3 data)) transformation 20 cao ) or ( luis 4 urban transport fuel cacao ))".
• Adding a wildcard symbol may retrieve word variants: (( luis ((e data) OR (3 data)) transformation 20 cao ) or ( luis 4 urban transport fuel cacao ))*.