Perhaps you should try some spelling variations:
transfer extraction » transfer operation, parameter extraction
developpement la » developpement de, developpement et, developpement du
1 communication » 10 communication, 3 communication, 4 communication
3 developpement » de developpement, le developpement, et developpement
extraction 3 » extraction _, extraction 4, extraction 7
networks 3 » networks _, networks 1, networks a
la afrique » l afrique, la fabrique, en afrique
3 facts » _ facts, 2 facts, 1 facts
facts 1 » facts _

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

• Adding a wildcard symbol may retrieve word variants: technology transfer extraction 3 facts 1 communication networks 3 developpement la afrique.*.