Perhaps you should try some spelling variations:
technology transfers » technology transfer
trade developpement » trade developement, trade development, de developpement
developpement de » developpement des, developpement durable
2 communication » 3 communication, 4 communication, 1 communication
transfers term » transfers after, transfers pedro, transfers from
targets while » target while, targets whole, targets where
term targets » term target, term assets
de afrique » de l'afrique, en afrique, l afrique
while 2 » while _, chile 2, while a

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

• Adding a wildcard symbol may retrieve word variants: technology transfers term targets while 2 communication _ trade developpement de afrique.*.