Perhaps you should try some spelling variations:
china's transport » africa's transport, india's transport
water transport » air transport, water transfer
transport a » transport _, transport data
do china's » mo china's, does china's, how china's
aguas use » gas use, aguas de
use water » unsafe water
aguas do » aguas de, aguas del
did a » did _, aid a
did i » did _
a co » _ co

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: (( aguas do china's transport ((did a) OR (did i)) ) OR ( aguas use water transport a co ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( aguas do china's transport ((did a) OR (did i)) ) or ( aguas use water transport a co ))~".
• Adding a wildcard symbol may retrieve word variants: (( aguas do china's transport ((did a) OR (did i)) ) or ( aguas use water transport a co ))*.