Perhaps you should try some spelling variations:
head transfer » heat transfer, heart transfer, load transfer
tariffs data » tariff data, tariffs a
luis e » luis f, luis c
luis a » luis f, luis c
a head » _ head
cost 5 » cost 15, cost _, cost 7
cost 4 » cost _, cost 2.4
e bus » _ bus

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 e bus transport tariffs data ) OR ( luis a head transfer ((cost 5) OR (cost 4)) ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( luis e bus transport tariffs data ) or ( luis a head transfer ((cost 5) OR (cost 4)) ))~".
• Adding a wildcard symbol may retrieve word variants: (( luis e bus transport tariffs data ) or ( luis a head transfer ((cost 5) OR (cost 4)) ))*.