Perhaps you should try some spelling variations:
vertical communication » verbal communication, virtual communication, optical communication
rural development » social development
development zones » development zone, development money, development alone
technology 3.1 » technology 1, technology 2.2, technology _
from vertical » from virtual, from critical, from medical
zones africa » rates africa, towns africa, works africa
gap from » gaps from, map from, gdp from

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology 3.1 information gap from vertical communication _ rural development zones africa.*.