Perhaps you should try some spelling variations:
based transfer » based transfers, basin transfer, basin transfers
transport mode » transport modes
a transport » 3 transport, 4 transport, sea transport
value keys » values key
guias les » guide les, guias de
les based » les bases, aes based, ses based
keys a » keys _, keynes a, keys rsa
mode a » mode ad, mode _, code a

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( value keys a transport mode a ) or ( guias les based transfer _ a ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( value keys a transport mode a ) OR ( guias les based transfer _ a ))*.