Perhaps you should try some spelling variations:
china's transport » africa's transport, india's transport
transport system » transport sector
di china's » did china's, ii china's, dan china's
des carl » des care, dr carl, bei carl
aguas di » aguas de, aguas do, aguas del
de carl » dr carl, de cara, de care

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: (( gua ((de carl) OR (des carl)) transport system a ) OR ( aguas di china's transport _ cacao ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( gua ((de carl) OR (des carl)) transport system a ) or ( aguas di china's transport _ cacao ))~".
• Adding a wildcard symbol may retrieve word variants: (( gua ((de carl) OR (des carl)) transport system a ) or ( aguas di china's transport _ cacao ))*.