Perhaps you should try some spelling variations:
transfer africa » transfer price
data transfer » cash transfer, heat transfer
agent caused » agent based, events caused
africa mark » africa market, africa macro, africa march
age causes » age case, aux causes, die causes
luis rdf » luis f, luis de
rdf data » dlf data, imf data
luis a » 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 a _ transfer africa mark ) or ( luis rdf data transfer ((agent caused) OR (age causes)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( luis a _ transfer africa mark ) OR ( luis rdf data transfer ((agent caused) OR (age causes)) ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( luis a _ transfer africa mark ) or ( luis rdf data transfer ((agent caused) OR (age causes)) ))*".