Perhaps you should try some spelling variations:
vote communication » voice communication, ante communication, remote communication
technology change » technological change, technological changes
change innovation » change information, chain innovation, trade innovation
developpement en » developpement et, developpement des, developpement de
innovation when » innovation where, innovation what, innovation why
when has » where has, when base, when have
has vote » dans vote, has gone, has come

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

• Adding a wildcard symbol may retrieve word variants: technology change innovation when has vote communication costs _ developpement en afrique.*.