Perhaps you should try some spelling variations:
cases transfers » cash transfers, based transfers, cash transfer
transport a » transport _, transport data
2 africa's » _ africa's, 2 african
use cases » use case
field cao » field case, field 2a, field bo
bus use » bus users
field a » field _, field 3, field 4
a macro » _ macro
luis 2 » luis f, luis c, luis a

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: (( bus use cases transfers ((field cao) OR (field a)) ) OR ( luis 2 africa's transport a macro ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( bus use cases transfers ((field cao) OR (field a)) ) or ( luis 2 africa's transport a macro ))~".
• Adding a wildcard symbol may retrieve word variants: (( bus use cases transfers ((field cao) OR (field a)) ) or ( luis 2 africa's transport a macro ))*.