Perhaps you should try some spelling variations:
cost transfers » cost transfer, cash transfers, cast transfer
land transport » road transport
demand map » demand may, demand gaps, demand a
demand gap » demand gaps, demand a, demand may
luis use » bus use, luis e, luis de
use cost » user cost, user costs, use case
luis a » luis f, luis c
a land » 1 land

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 use cost transfers _ can ) OR ( luis a land transport ((demand map) OR (demand gap)) ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( luis use cost transfers _ can ) or ( luis a land transport ((demand map) OR (demand gap)) ))~".
• Adding a wildcard symbol may retrieve word variants: (( luis use cost transfers _ can ) or ( luis a land transport ((demand map) OR (demand gap)) ))*.