Perhaps you should try some spelling variations:
cause communication » causes communication, change communication, couple communication
technologies 6 » technologies _, technologies 4, technologies 2
development la » development law, development li, development land
policy 7.1 » policy 3.1, policy 2.1, policy 6.1
la afrique » l afrique, la fabrique, en afrique
7.1 cause » 6.1 cause, 7.1 case, 2.1 causes
6 reform » 3 reform, 2 reform, 4 reform
a dams » _ dams, a dam, 6 dams
a das » 1 das, 2 das, 3 das

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies 6 reform policy 7.1 cause communication ((a dams) OR (a das)) development la afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies 6 reform policy 7.1 cause communication ((a dams) OR (a das)) development la afrique.*.