Perhaps you should try some spelling variations:
oral communication » personal communication
trade information » price information, private information, trade integration
die developpement » de developpement, le developpement, du developpement
technology trade » technology trends, technology transfer, technology transfers
information 17.2 » information 1.2, information 15.2, information 11.2
developpement la » developpement de, developpement et, developpement du
la afrique » l afrique, la fabrique, en afrique
17.2 do » 17.2 how
do oral » do rural, who oral

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

• Adding a wildcard symbol may retrieve word variants: technology trade information 17.2 do oral communication _ die developpement la afrique.*.