Perhaps you should try some spelling variations:
teaching learning » machine learning
ideas transport » ideas transform, india's transport, sea transport
transport bei » transport b, transport de, transport based
learning path » learning pt, learning phase, learning pathways
luis a » luis f, luis c
marx » mark, mary, marc

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 _ ideas transport bei marx ) OR ( luis a 1 teaching learning path ))~.
• Adding a wildcard symbol may retrieve word variants: (( luis _ ideas transport bei marx ) or ( luis a 1 teaching learning path ))*.